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
355867Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
3558671721.8old
ECM
DigitsB1Curves
2550000280 / 280
30250000514 / 640
Estimated T-Level: 29.0
TF below 2^91 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-23Oliver KruseE81FB75565A7ABA41013
Verified2017-10-13Oliver KruseE81FB75565A7ABA4134433813
Verified2017-12-15ATHE81FB75565A7ABA411479813
Verified2020-04-18Oliver KruseE7C75E6CBE19F0AE132871053
Verified2024-09-18kkmrkkblmbrbkE7C75E6CBE19F0AE130255753
History
DateUserTypeResult
2024-10-07yuriy_5-1NF-PM1
B1=12000002, B2=2124117455460
2024-09-18Chun sung sooCERT
PRP Certification
Proof certified good
2024-09-18kkmrkkblmbrbkC-PRP
M355867/3558671 : E7C75E6CBE19F0AE
PRP proof power = 5
PRP: Verified
Proof certified good
2023-12-03USAFSSNF-PM1
B1=1530000, B2=5367308100
2022-02-06Lisander ViaeneNF-PM1
B1=50000
2020-04-18Oliver KruseC-PRP
M355867/3558671 : E7C75E6CBE19F0AE
PRP: Verified
PRP without proof (small exponent)
2017-12-15ATHC-PRP
M355867/3558671 : E81FB75565A7ABA4
PRP: Verified
PRP without proof (small exponent)
2017-10-13Oliver KruseC-PRP
M355867/3558671 : E81FB75565A7ABA4
PRP: Verified
PRP without proof (small exponent)
2017-09-23Oliver KruseC-PRP
M355867/3558671 : E81FB75565A7ABA4
PRP: Verified
PRP without proof (not generated)
2017-09-23Oliver KruseC-PRP
M355867/3558671 : E81FB75565A7ABA4
PRP without proof (not generated)