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
7681889Factored
FactorDigitsBitsDate
143036773191133.7old
7771080664746608068812169.42021-07-26 15:21:20
ECM
DigitsB1Curves
25500001 / 280
Estimated T-Level: 20.0
TF below 2^61 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified (Factored)2018-04-20Oliver KruseB8C5C8236B5BA1CC1293853253
Verified (Factored)2019-08-19Cornell LibraryB8C5C8236B5BA1CC1732776753
Verified2021-07-26ATHB8C5C8236B5BA1CC2419647353
History
DateUserTypeResult
2024-01-24Stef42NF-PM1
B1=900000, B2=1750667100
2021-07-26curtiscCERT
PRP Certification
Proof certified good
2021-07-26ATHC-PRP
M7681889/14303677319/777108066474660806881 : B8C5C8236B5BA1CC
PRP proof power = 8
PRP: Verified
Proof certified good
2021-07-26ATHF-PP1
Start=2/7, B1=500000, Factor: 777108066474660806881
2019-08-19Cornell LibraryC-PRP
M7681889/14303677319 : B8C5C8236B5BA1CC
PRP: Verified (Factored)
PRP without proof (not generated)
2018-04-20Oliver KruseC-PRP
M7681889/14303677319 : B8C5C8236B5BA1CC
PRP: Verified (Factored)
PRP without proof (not generated)