Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

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Exponent Range:










MnStatusDetails
1447861Factored
FactorDigitsBitsDate
16319925874766355431960.52010-04-12 00:18:29
2558019663122425635672167.82019-03-08 12:27:42
ECM
DigitsB1Curves
2550000280 / 280
30250000107 / 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)John PlattB386A3830E5336350
Verified (Factored)1999-01-29Eugene O'DonnellB386A3830E533635165586
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified (Factored)2017-10-01Oliver Kruse350DCAD3042D31D81013
Verified (Factored)2017-11-04kkmrkkblmbrbk350DCAD3042D31D8169472713
Verified2019-03-09trebor79CC273C517AB0BB245607253
Verified2019-03-10kkmrkkblmbrbk79CC273C517AB0BB257821453
History
DateUserTypeResult
2019-03-10kkmrkkblmbrbkC-PRP
M1447861/1631992587476635543/255801966312242563567 : 79CC273C517AB0BB
PRP: Verified
PRP without proof (not generated)
2019-03-09treborC-PRP
M1447861/1631992587476635543/255801966312242563567 : 79CC273C517AB0BB
PRP: Verified
PRP without proof (not generated)
2019-03-08TJAOIF-ECM
Factor: 255801966312242563567 / (ECM curve 32, B1=50000, B2=5000000)
2017-11-04kkmrkkblmbrbkC-PRP
M1447861/1631992587476635543 : 350DCAD3042D31D8
PRP: Verified
PRP without proof (not generated)
2017-10-01Oliver KruseC-PRP
M1447861/1631992587476635543 : 350DCAD3042D31D8
PRP: Verified
PRP without proof (not generated)
2016-03-17alpertronNF-PM1
B1=500000, B2=15000000, E=12
2010-04-12KAMCOBILLF-ECM
Factor: 1631992587476635543