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
2557Factored
FactorDigitsBitsDate
9200600137664804427696753007749993052371042038105126355156185.92019-04-07 22:23:29
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000009201 / 9201
504400000016550 / 16550
5511000000040830 / 40830
60260000000105362 / 105362
65800000000194238 / 194238
702400000000136704 / 350860
Estimated T-Level: 66.9 ⓘ
TF below 2^217 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Unknown34D10
Verified (Factored)George WoltmanB31C2E206863B4D10
Verified (Factored)Brian J. BeesleyB31C2E206863B4D10
Verified (Factored)2015-04-11MadPooB31C2E206863B4D1904
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2019-04-07matzetoni992E7F45D5B4F7AE1198253
Verified2019-04-08ATH992E7F45D5B4F7AE1131353
Verified2019-04-08kkmrkkblmbrbk992E7F45D5B4F7AE1131453
Verified2020-04-17Oliver Kruse992E7F45D5B4F7AE1112053
History
DateUserTypeResult
2020-04-17Oliver KruseC-PRP
M2557/92006001376648044276967530077499930523710420381051263551 : 992E7F45D5B4F7AE
PRP: Verified
PRP without proof (small exponent)
2019-04-08kkmrkkblmbrbkC-PRP
M2557/92006001376648044276967530077499930523710420381051263551 : 992E7F45D5B4F7AE
PRP: Verified
PRP without proof (small exponent)
2019-04-08ATHC-PRP
M2557/92006001376648044276967530077499930523710420381051263551 : 992E7F45D5B4F7AE
PRP: Verified
PRP without proof (small exponent)
2019-04-07matzetoniC-PRP
M2557/92006001376648044276967530077499930523710420381051263551 : 992E7F45D5B4F7AE
PRP: Verified
PRP without proof (small exponent)
2019-04-07Ryan PropperF-ECM
Factor: 92006001376648044276967530077499930523710420381051263551
2018-11-06JossNF-PM1
B1=200000000000, B2=18000000000000, E=12
2018-11-05JossNF-PM1
B1=200000000000, B2=15000000000000, E=12
2018-11-02JossNF-PM1
B1=200000000000, B2=7000000000000, E=12
2018-11-01JossNF-PM1
B1=200000000000, B2=4000000000000, E=12
2018-10-31JossNF-PM1
B1=200000000000, B2=2000000000000, E=12
2018-05-02snme2pm1NF
no factor from 2^63 to 2^64
2016-11-21snme2pm1NF
no factor from 2^62 to 2^63
2016-02-23LaurVNF
no factor from 2^57 to 2^58
2015-06-29snme2pm1NF
no factor from 2^61 to 2^62
2015-04-11MadPooC-LL
B31C2E206863B4D1
2014-12-24James HintzNF-PM1
B1=100000000000, B2=10000000000000, E=12
2013-01-31Stef42NF-PM1
B1=20000000000
2012-05-22bcp19NF
no factor from 2^60 to 2^61
2011-04-15JossNF-PM1
B1=10000000000
2011-01-04monstNF
no factor from 2^58 to 2^60