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
2031217Factored
FactorDigitsBitsDate
59710792413531342.4old
14551209939785260480732270.32021-06-08 22:32:03
ECM
DigitsB1Curves
2550000280 / 280
30250000112 / 640
Estimated T-Level: 25.9
TF below 2^81 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified (Factored)2017-10-06Oliver KruseC6B499D9ACDCB23A1013
Verified (Factored)2017-11-14kkmrkkblmbrbkC6B499D9ACDCB23A111752713
Verified2021-06-10tottenhoffDABD919674852513297661053
History
DateUserTypeResult
2021-06-10curtiscCERT
PRP Certification
Proof certified good
2021-06-10tottenhoffC-PRP
M2031217/5971079241353/1455120993978526048073 : DABD919674852513
PRP proof power = 7
PRP: Verified
Proof certified good
2021-06-08_p95holder_F-ECM
Factor: 1455120993978526048073 / (ECM curve 2, B1=50000, B2=5000000)
2017-11-14kkmrkkblmbrbkC-PRP
M2031217/5971079241353 : C6B499D9ACDCB23A
PRP: Verified (Factored)
PRP without proof (not generated)
2017-10-06Oliver KruseC-PRP
M2031217/5971079241353 : C6B499D9ACDCB23A
PRP: Verified (Factored)
PRP without proof (not generated)
2016-03-17alpertronNF-PM1
B1=500000, B2=15000000, E=12