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
2157797Factored
FactorDigitsBitsDate
51787129825.6old
12083663211030.22008-07-14 20:20:54
12148185055785373024092270.02022-03-15 09:02:52
ECM
DigitsB1Curves
255000098 / 280
Estimated T-Level: 21.8
TF below 2^67 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified (Factored)2017-10-08Oliver KruseB2E34B23C20320CA2013
Verified (Factored)2017-11-18kkmrkkblmbrbkB2E34B23C20320CA2171261413
Verified2022-03-15SRJ287722B95DC925E54B533144734453
History
DateUserTypeResult
2022-03-15George WoltmanCERT
PRP Certification
Proof certified good
2022-03-15SRJ2877C-PRP
M2157797/51787129/1208366321/1214818505578537302409 : 22B95DC925E54B53
PRP proof power = 7
PRP: Verified
Proof certified good
2022-03-15_p95holder_F-ECM
Factor: 1214818505578537302409 / (ECM curve 7, B1=50000, B2=5000000)
2017-11-18kkmrkkblmbrbkC-PRP
M2157797/51787129/1208366321 : B2E34B23C20320CA
PRP: Verified (Factored)
PRP without proof (not generated)
2017-10-08Oliver KruseC-PRP
M2157797/51787129/1208366321 : B2E34B23C20320CA
PRP: Verified (Factored)
PRP without proof (not generated)
2016-03-29alpertronNF-PM1
B1=500000, B2=15000000, E=12
2008-07-14George WoltmanF-ECM
Factor: 1208366321