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
1886449Factored
FactorDigitsBitsDate
151348623237104646312063.72009-07-25 06:24:12
ECM
DigitsB1Curves
2550000280 / 280
30250000106 / 640
Estimated T-Level: 25.8
TF below 2^81 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)David Linton40162CD72F3786F50
Verified (Factored)1999-01-02Jochen Schrader40162CD72F3786F51303273
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-04Oliver Kruse4F50998C432A537D1013
Verified2017-11-08kkmrkkblmbrbk4F50998C432A537D1160925013
History
DateUserTypeResult
2017-11-08kkmrkkblmbrbkC-PRP
M1886449/15134862323710464631 : 4F50998C432A537D
PRP: Verified
PRP without proof (not generated)
2017-10-04Oliver KruseC-PRP
M1886449/15134862323710464631 : 4F50998C432A537D
PRP: Verified
PRP without proof (not generated)
2016-03-16alpertronNF-PM1
B1=500000, B2=15000000, E=12
2009-07-25ksimsF-ECM
Factor: 15134862323710464631