A megaprime is a prime number with at least one million decimal digits.^{[1]}
A titanic prime, a term coined by Samuel Yates in the 1980s, is a prime number with at least 1,000 digits; and a gigantic prime has at least 10,000 digits.
As of 11 January 2022^{[update]}, 1268 (probable) megaprimes are known, including 1194 definite primes^{[2]} and 74 probable primes.^{[3]} The first to be found was the Mersenne prime 2^{6972593}−1 with 2,098,960 digits, discovered in 1999 by Nayan Hajratwala, a participant in the distributed computing project GIMPS,^{[4]}^{[5]} and was subject to a cooperative computing award.
The term bevaprime has been proposed as a term for a prime with at least 1,000,000,000 digits.^{[6]}
In fact, almost all primes are megaprimes, as the number of primes with fewer than one million digits is finite. However, the vast majority of known primes are not megaprimes.
All numbers from 10^{999999} through 10^{999999} + 593498 are known to be composite, and there is a very high probability 10^{999999} + 593499, a strong PRP, is actually the smallest megaprime.^{[7]}
The last prime that is not a megaprime is almost certainly 10^{999999}  172473.^{[3]}
This is a dynamic list and may never be able to satisfy particular standards for completeness. You can help by adding missing items with reliable sources. 
Entries labelled "Prime" have been proved prime; those labelled "PRP" have not and primes that hasn't been fully verified by Prime Pages will be ranked, but be listed as a PRP. See the article Probable prime. Only primes with more than 2,000,000 digits are included in this list.
Rank (only for proven primes)^{[8]}  Number  Discovery date  Decimal digits  Prime / PRP 

1  2^{82589933} – 1 ^{[9]}

7 December 2018  24,862,048  Prime 
2  2^{77232917} – 1 ^{[10]}

26 December 2017  23,249,425  Prime 
3  2^{74207281} – 1 ^{[11]}

7 January 2016  22,338,618  Prime 
4  2^{57885161} – 1 ^{[12]}

25 January 2013  17,425,170  Prime 
5  2^{43112609} – 1 ^{[13]}

23 August 2008  12,978,189  Prime 
6  2^{42643801} – 1 ^{[14]}

4 June 2009  12,837,064  Prime 
7  2^{37156667} – 1 ^{[13]}

6 September 2008  11,185,272  Prime 
8  2^{32582657} – 1 ^{[15]}

4 September 2006  9,808,358  Prime 
9  10223×2^{31172165} + 1 ^{[16]}

31 October 2016  9,383,761  Prime 
10  2^{30402457} – 1 ^{[17]}

15 December 2005  9,152,052  Prime 
  8 May 2021  8,177,207  PRP  
11  2^{25964951} – 1 ^{[18]}

18 February 2005  7,816,230  Prime 
12  2^{24036583} – 1 ^{[19]}

15 May 2004  7,235,733  Prime 
13  202705×2^{21320516} + 1 ^{[20]}

1 December 2021  6,418,121  Prime 
14  2^{20996011} – 1 ^{[21]}

17 November 2005  6,320,430  Prime 
15  1059094^{1048576} + 1 ^{[22]}

4 November 2018  6,317,602  Prime 
16  919444^{1048576} + 1 ^{[23]}

2 September 2017  6,253,210  Prime 
17  168451×2^{19375200} + 1 ^{[24]}

26 September 2017  5,832,522  Prime 
  20 April 2021  5,794,777  PRP  
18  69×2^{18831865}  1  16 December 2021  5,668,959  Prime 
19  7×2^{18233956} + 1  1 October 2020  5,488,969  Prime 
20  3×2^{17748034}  1 ^{[25]}

6 September 2021  5,342,692  Prime 
21  23 February 2017  5,338,805  Prime  
22  7×6^{6772401} + 1  9 September 2019  5,269,954  Prime 
23  8508301×2^{17016603}1 ^{[26]}

22 March 2018  5,122,515  Prime 
24  3×2^{16819291}1 ^{[27]}

20 January 2021  5,063,112  Prime 
25  3×2^{16408818}+1 ^{[28]}

28 October 2020  4,939,547  Prime 
26  69×2^{15866556}+1  20 August 2021  4,776,312  Prime 
27  2525332×73^{2525332}+1  28 August 2021  4,705,888  Prime 
28  2^{15317227}+2^{7658614}+1  31 July 2020  4,610,945  Prime 
29  6×5^{6546983}+1  13 June 2020  4,576,146  Prime 
  ^{[3]}

June 2021  4,556,209  PRP 
30  69×2^{14977631}1  3 December 2021  4,508,719  Prime 
31  192971×2^{14773498}1  7 March 2021  4,447,272  Prime 
32  6962×31^{2863120}1  29 February 2020  4,269,952  Prime 
33  99739×2^{14019102}1 ^{[29]}

25 December 2019  4,220,176  Prime 
34  404849×2^{13764867}+1  10 March 2021  4,143,644  Prime 
35  2740879×2^{13704395}1  26 October 2019  4,125,441  Prime 
36  479216×3^{8625889}1  16 November 2019  4,115,601  Prime 
37  30 January 2017  4,055,114  Prime  
38  2^{13466917} – 1 ^{[30]}

14 November 2001  4,053,946  Prime 
  2^{13380298} – 27  March 2021  4,027,872  PRP 
  ^{[3]}

September 2013  4,025,533  PRP 
  ^{[3]}

September 2013  4,017,941  PRP 
39  9×2^{13334487} + 1  31 March 2020  4,014,082  Prime 
40  206039×2^{13104952}  1  26 April 2021  3,944,989  Prime 
41  2805222×5^{5610444} + 1 ^{[31]}

3 September 2019  3,921,539  Prime 
42  19249×2^{13018586} + 1 ^{[2]}

26 March 2007  3,918,990  Prime 
43  2293×2^{12918431}  1  13 February 2021  3,888,839  Prime 
  ^{[3]}

July 2020  3,763,995  PRP 
44  9×2^{12406887} + 1  29 March 2020  3,734,847  Prime 
45  69×2^{12231580}  1  27 July 2021  3,682,075  Prime 
46  27*2^{12184319} + 1  6 February 2021  3,667,847  Prime 
47  3×2^{11895718} − 1 ^{[2]}

26 June 2015  3,580,969  Prime 
48  3×2^{11731850} − 1 ^{[32]}

13 March 2015  3,531,640  Prime 
49  69×2^{11718455} − 1 ^{[2]}

4 December 2020  3,527,609  Prime 
50  69×2^{11604348} − 1 ^{[2]}

4 December 2020  3,493,259  Prime 
51  9×2^{11500843} + 1 ^{[2]}

13 March 2020  3,462,100  Prime 
52  3×2^{11484018} − 1 ^{[33]}

22 November 2014  3,457,035  Prime 
53  193997*2^{11452891} +1  3 April 2018  3,447,670  Prime 
54  3638450^{524288} +1  31 May 2020  3,439,810  Prime 
55  9221*2^{11392194} 1  7 February 2021  3,429,397  Prime 
56  9*2^{11366286} +1  26 March 2020  3,421,594  Prime 
57  5*2^{11355764} 1  2 October 2021  3,418,427  Prime 
58  3214654^{524288} +1  25 December 2019  3,411,613  Prime 
59  146561*2^{11280802} 1  17 November 2020  3,395,865  Prime 
60  2985036^{524288} +1  19 September 2019  3,394,739  Prime 
61  2877652^{524288} +1  29 June 2019  3,386,397  Prime 
62  2788032^{524288} +1  18 April 2019  3,379,193  Prime 
63  2733014^{524288} +1  19 March 2019  3,374,655  Prime 
64  9*2^{11158963} +1  13 March 2020  3,359,184  Prime 
65  9271*2^{11134335} 1  17 January 2021  3,351,773  Prime 
66  2312092^{524288}+1  5 August 2018  3,336,572  Prime 
67  2061748^{524288}+1  21 March 2018  3,310,478  Prime 
68  1880370^{524288} + 1  15 January 2018  3,289,511  Prime 
69  3×2^{10829346} + 1 ^{[34]}

14 January 2014  3,259,959  Prime 
70  5×2^{10495620}  1  26 September 2021  3,159,498  Prime 
  ^{[3]}

9 July 2020  3,143,811  PRP 
71  5×2^{10349000}  1  26 September 2021  3,115,361  Prime 
72  17 January 2017  3,107,335  Prime  
73  14 January 2017  3,068,389  Prime  
74  874208*54^{1748416}1  26 September 2019  3,028,951  Prime 
75  475856^{524288} + 1 ^{[35]}

8 August 2012  2,976,633  Prime 
76  9*2^{9778263}+1  5 August 2020  2,943,552  Prime 
77  1806676*41^{1806676}+1  12 March 2018  2,913,785  Prime 
78  356926^{524288} + 1 ^{[36]}

25 July 2012  2,911,151  Prime 
79  341112^{524288} + 1 ^{[37]}

25 June 2012  2,900,832  Prime 
80  121*2^{9584444}+1  20 November 2020  2,885,208  Prime 
81  11*2^{9381365}+1  7 March 2020  2,824,074  Prime 
82  27653×2^{9167433} + 1 ^{[2]}

8 June 2005  2,759,677  Prime 
83  90527×2^{9162167} + 1  30 June 2010  2,758,093  Prime 
  2^{9092392} + 40291 ^{[3]}

February 2011  2,737,083  PRP 
84  6795×2^{9144320}  1  31 March 2021  2,752,719  Prime 
86  1323365*116^{1323365}+1  18 January 2018  2,732,038  Prime 
86  13×2^{8989858} + 1  10 March 2020  2,706,219  Prime 
87  273809×2^{8932416} − 1 ^{[38]}

13 December 2017  2,688,931  Prime 
88  2×3^{5570081} + 1  14 February 2020  2,657,605  Prime 
89  25×2^{8788628} + 1  1 March 2021  2,645,643  Prime 
90  2038×366^{1028507} − 1 ^{[38]}

4 April 2016  2,636,562  Prime 
91  17×2^{8636199} + 1  17 February 2021  2,599,757  Prime 
92  75898^{524288} + 1 ^{[39]}

19 November 2021  2,558,647  Prime 
93  25×2^{8456828} + 1  28 January 2021  2,545,761  Prime 
94  39×2^{8413422} + 1  23 January 2021  2,532,694  Prime 
95  31×2^{8348000} + 1  19 January 2021  2,513,000  Prime 
96  27×2^{8342438}  1  1 February 2021  2,511,326  Prime 
97  3867×2^{8261084}  1  14 April 2021  2,486,838  Prime 
  ^{[3]}

August 2020  2,449,236  PRP 
98  273662×5^{3493296}  1  7 December 2021  2,441,715  Prime 
99  11×2^{8103463} + 1  6 March 2020  2,439,387  Prime 
100  102818×5^{3440382}  1  10 October 2021  2,404,729  Prime 
101  11×2^{7971110}  1  25 November 2019  2,399,545  Prime 
102  27×2^{7963247} + 1  16 January 2021  2,397,178  Prime 
103  3177×2^{7954621}  1  13 June 2021  2,394,584  Prime 
104  39×2^{7946769} + 1  15 January 2021  2,392,218  Prime 
105  7×6^{3072198} + 1  4 August 2019  2,390,636  Prime 
106  3765×2^{7904593}  1  10 January 2021  2,379,524  Prime 
107  29×2^{7899985} + 1  15 January 2021  2,378,134  Prime 
108  861×2^{7895451}  1  21 February 2021  2,376,771  Prime 
  ^{[3]}

July 2021  2,358,349  PRP 
109  28433×2^{7830457} + 1 ^{[2]}

31 December 2004  2,357,207  Prime 
110  5×2^{7755002}  1  23 September 2021  2,334,489  Prime 
111  2545×2^{7732265}  1  13 January 2021  2,327,648  Prime 
112  5539×2^{7730709}  1  15 January 2021  2,327,180  Prime 
113  4817×2^{7719584}  1  13 June 2021  2,323,831  Prime 
114  1341174×53^{1341174} + 1  22 August 2017  2,312,561  Prime 
115  45×2^{7661004} + 1  13 December 2020  2,306,194  Prime 
116  15×2^{7619838} + 1  24 December 2020  2,293,801  Prime 
117  3597×2^{7580693}  1  10 January 2021  2,282,020  Prime 
118  7401×2^{7523295}  1  21 February 2021  2,264,742  Prime 
119  45×2^{7513661} + 1  12 November 2020  2,261,839  Prime 
120  11 January 2017  2,259,865  Prime  
121  29×2^{7374577} + 1  28 October 2020  2,219,971  Prime 
122  109838×5^{3168862}  1  13 August 2020  2,219,971  Prime 
123  101×2^{7345194}  1  5 October 2019  2,219,971  Prime 
  ^{[3]}

March 2018  2,201,714  PRP 
124  15×2^{7300254} + 1  25 October 2020  2,219,971  Prime 
125  1759×2^{7284439}  1  28 August 2021  2,219,971  Prime 
126  737×2^{7269322} − 1  10 August 2017  2,188,287  Prime 
127  118568×5^{3112069} + 1  2 May 2020  2,175,248  Prime 
128  6039×2^{7207973} − 1  24 March 2021  2,169,820  Prime 
129  502573×2^{7181987} − 1 ^{[40]}

4 October 2014  2,162,000  Prime 
130  402539×2^{7173024} − 1 ^{[41]}

2 October 2014  2,159,301  Prime 
131  3343×2^{7166019}  1  29 September 2016  2,157,191  Prime 
132  161041×2^{7107964} + 1  8 January 2015  2,139,716  Prime 
  October 2017  2,131,318  PRP  
133  27*2^{7046834}+1  16 October 2018  2,121,310  Prime 
134  1759×2^{7046791}  1  28 August 2021  2,121,299  Prime 
135  327×2^{7044001}  1  13 January 2021  2,120,459  Prime 
136  5×2^{7037188}  1  22 September 2021  2,118,406  Prime 
137  3×2^{7033641} + 1 ^{[42]}

21 February 2011  2,117,338  Prime 
138  33661×2^{7031232} + 1 ^{[2]}

30 October 2007  2,116,617  Prime 
139  6 January 2017  2,114,016  Prime  
140  207494*5^{3017502}1  19 March 2020  2,109,149  Prime 
141  15*2^{6993631}1  25 August 2021  2,105,294  Prime 
142  8943501*2^{6972593}1  8 January 2022  2,098,967  Prime 
143  2^{6972593} – 1 ^{[4]}

1 June 1999  2,098,960  Prime 
144  6219*2^{6958945}1  7 January 2021  2,094,855  Prime 
145  51*2^{6945567}+1  26 May 2020  2,090,826  Prime 
146  238694*5^{2979422}1  13 March 2020  2,082,532  Prime 
147  4×72^{1119849} − 1 ^{[38]}

7 September 2016  2,079,933  Prime 
148  33*2^{6894190}1  27 July 2021  2,075,360  Prime 
149  146264*5^{2953282}1  10 March 2020  2,064,261  Prime 
150  69*2^{6838971}1  1 March 2020  2,058,738  Prime 
151  35816*5^{2945294}1  5 March 2020  2,058,677  Prime 
152  127*2^{6836153}1  25 June 2018  2,057,890  Prime 
153  19*2^{6833086}+1  25 October 2020  2,056,966  Prime 
154  40597×2^{6808509} – 1 ^{[43]}

27 November 2013  2,049,571  Prime 
155  283*2^{6804701}1  19 January 2020  2,048,431  Prime 
156  1861209*2^{6789999}+1  2 December 2020  2,044,000  Prime 
157  5817*2^{6789459}1  9 January 2021  2,043,835  Prime 
158  8435*2^{6786180}1  7 January 2021  2,042,848  Prime 
159  51*2^{6753404}+1  26 May 2020  2,032,979  Prime 
160  9995*2^{6711008}1  31 December 2020  2,020,219  Prime 
161  39*2^{6684941}+1  20 October 2020  2,012,370  Prime 
162  6679881×2^{6679881} + 1 ^{[44]}

25 July 2009  2,010,852  Prime 
163  37×2^{6660841} − 1 ^{[38]}

30 July 2014  2,005,115  Prime 
164  39*2^{6648997}+1  20 October 2020  2,001,550  Prime 