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
4230917Factored
FactorDigitsBitsDate
118914421672638158172063.42010-06-12 14:40:43
289466548576506251272064.72017-12-05 12:36:45
ECM
DigitsB1Curves
25500002 / 280
Estimated T-Level: 20.0
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Per Salomonsen48F35C04D5A285820
Verified (Factored)2000-08-01Stephen Wood48F35C04D5A285823461281
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified (Factored)2017-09-20kkmrkkblmbrbk611286A8F75EC1BD1013
Verified2017-12-05ATH8E9E76596C0D611E2156359053
Verified2017-12-28kkmrkkblmbrbk8E9E76596C0D611E2115680253
History
DateUserTypeResult
2022-08-20USAFSSNF-PM1
B1=270000, B2=150686250
2022-06-21LordJuliusNF
no factor from 2^61 to 2^63
2017-12-28kkmrkkblmbrbkC-PRP
M4230917/11891442167263815817/28946654857650625127 : 8E9E76596C0D611E
PRP: Verified
PRP without proof (not generated)
2017-12-05ATHC-PRP
M4230917/11891442167263815817/28946654857650625127 : 8E9E76596C0D611E
PRP: Verified
PRP without proof (not generated)
2017-12-05TJAOIF
Factor: 28946654857650625127 / TF: 64-65
2017-09-20kkmrkkblmbrbkC-PRP
M4230917/11891442167263815817 : 611286A8F75EC1BD
PRP: Verified
PRP without proof (not generated)
2010-06-12Aca ArsovF-ECM
Factor: 11891442167263815817