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
617531Factored
FactorDigitsBitsDate
1235063720.2old
8503563613381195267388563032789.52023-01-07 14:28:03
ECM
DigitsB1Curves
2550000280 / 280
30250000215 / 640
Estimated T-Level: 26.7 ⓘ
TF below 2^84 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified (Factored)2017-09-27Oliver KruseD57E4CE16EFC45531013
Verified (Factored)2017-10-13Oliver KruseD57E4CE16EFC4553156117513
Verified (Factored)2017-12-15ATHD57E4CE16EFC4553138688013
Verified (Factored)2020-04-19Oliver KruseE37126071FDFDF6D134406953
Verified (Factored)2022-05-12Jorge CoveiroE37126071FDFDF6D135764253
Verified2023-01-08LordJuliusE37126071FDFDF6D21846153
P-1 factors
DateFactorB1B2
2023-01-0785035636133811952673885630317500005399784390
History
DateUserTypeResult
2023-01-08Chad Steenerson CERT
PRP Certification
Proof certified good
2023-01-08LordJuliusC-PRP
M617531/1235063/850356361338119526738856303 : E37126071FDFDF6D
PRP proof power = 6
PRP: Verified
Proof certified good
2023-01-07USAFSSF-PM1
Factor: 850356361338119526738856303 / (P-1, B1=1750000, B2=5399784390)
2022-05-12Jorge CoveiroC-PRP
M617531/1235063 : E37126071FDFDF6D
PRP proof power = 6
PRP: Verified (Factored)
PRP proof never uploaded
2020-04-19Oliver KruseC-PRP
M617531/1235063 : E37126071FDFDF6D
PRP: Verified (Factored)
PRP without proof (small exponent)
2017-12-15ATHC-PRP
M617531/1235063 : D57E4CE16EFC4553
PRP: Verified (Factored)
PRP without proof (small exponent)
2017-10-13Oliver KruseC-PRP
M617531/1235063 : D57E4CE16EFC4553
PRP: Verified (Factored)
PRP without proof (small exponent)
2017-09-27Oliver KruseC-PRP
M617531/1235063 : D57E4CE16EFC4553
PRP: Verified (Factored)
PRP without proof (not generated)
2016-03-17alpertronNF-PM1
B1=1000000, B2=30000000, E=12