Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
21569Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 266
TF target 244
TF below 2^149 is very unlikely to find new factors due to ECM effort.
P-1
B1 = 25000000000
B2 = 2500246931852670
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000009201 / 9201
50440000004729 / 16550
Estimated T-Level: 46.4 ⓘ
LL
StatusDateUserResidueShift
VerifiedUnknown39020
VerifiedGeorge Woltman44827D25F98BB9020
VerifiedBrian J. Beesley44827D25F98BB9020
Verified2015-04-11MadPoo44827D25F98BB90210035
History
DateUserTypeResult
2023-08-19masserNF-PP1
Start=6/5, B1=340000000, B2=60860000000
2023-07-08masserNF-PP1
Start=76/67, B1=340000000, B2=13600000000
2022-06-17ATHNF-PM1
B1=25000000000, B2=2500246931852670
2021-05-08ATHNF-PP1
Start=2/7, B1=500000000, B2=101500000000
2020-03-20YxinityNF
no factor from 2^65 to 2^66
2020-03-20YxinityNF
no factor from 2^65 to 2^66
2019-01-15YxinityNF
no factor from 2^64 to 2^65
2019-01-14YxinityNF
no factor from 2^64 to 2^65
2018-04-04YxinityNF
no factor from 2^63 to 2^64
2018-04-03YxinityNF
no factor from 2^63 to 2^64
2016-10-13Sid & AndyNF
no factor from 2^62 to 2^63
2016-02-23LaurVNF
no factor from 2^57 to 2^58
2015-04-11MadPooC-LL
44827D25F98BB902
2013-03-23bcp19NF-PM1
B1=10000000000, B2=100000000000, E=12
2012-02-18bcp19NF
no factor from 2^61 to 2^62
2012-02-18bcp19NF
no factor from 2^60 to 2^61
2009-02-07Sturle SundeNF
no factor from 2^59 to 2^60
2009-01-18Sturle SundeNF
no factor from 2^58 to 2^59