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
2657Factored
FactorDigitsBitsDate
37199515.2old
148793617.2old
318841618.3old
48349037623911342.1old
3872825114757531548.5old
24115511686139271651.1old
770280638577602631756.1old
8994982896394635556670689903547872180584141136.0old
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000009201 / 9201
504400000016550 / 16550
5511000000040830 / 40830
6026000000020270 / 105362
Estimated T-Level: 56.0
TF below 2^181 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-21Oliver Kruse4EB5D8F803DEBC868013
Verified2017-10-02kkmrkkblmbrbk4EB5D8F803DEBC868013
Verified2017-12-07ATH4EB5D8F803DEBC86865013
Verified2020-04-17Oliver Kruse7DD26CA536E04AA08166153
Verified2021-08-12mikr7DD26CA536E04AA088853
P-1 factors
DateFactorB1B2
2021-08-1265724114513256823395226049559731507718407027110000001000000
2021-08-1215849706516056005239350732725635734613278276664145112372642171000000010000000
History
DateUserTypeResult
2022-03-19PrimeNRNF-PM1
B1=500000000, B2=4063004615670
2021-09-01Jinyuan WangNF-PM1
B1=1300000000, B2=6500000000, E=12
2021-08-12mikrC-PRP
M2657/37199/148793/318841/4834903762391/387282511475753/2411551168613927/77028063857760263/89949828963946355566706899035478721805841 : 7DD26CA536E04AA0
PRP: Verified
PRP without proof (small exponent)
2021-08-12H MichaelsonF-PM1
Factor: 1584970651605600523935073272563573461327827666414511237264217 / (P-1, B1=10000000)
2021-08-12H MichaelsonF-PM1
Factor: 657241145132568233952260495597315077184070271 / (P-1, B1=1000000)
2020-04-17Oliver KruseC-PRP
M2657/37199/148793/318841/4834903762391/387282511475753/2411551168613927/77028063857760263/89949828963946355566706899035478721805841 : 7DD26CA536E04AA0
PRP: Verified
PRP without proof (small exponent)
2017-12-07ATHC-PRP
M2657/37199/148793/318841/4834903762391/387282511475753/2411551168613927/77028063857760263/89949828963946355566706899035478721805841 : 4EB5D8F803DEBC86
PRP: Verified
PRP without proof (small exponent)
2017-10-02kkmrkkblmbrbkC-PRP
M2657/37199/148793/318841/4834903762391/387282511475753/2411551168613927/77028063857760263/89949828963946355566706899035478721805841 : 4EB5D8F803DEBC86
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M2657/known_factors : 4EB5D8F803DEBC86
PRP without proof (not generated)