Marin Mersenne 2^P-1
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MnStatusDetails
238151Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
928212039684913283576812376.3old
539361848100586827138643379044731102.12025-04-07 02:36:46
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
351000000232 / 1566
Estimated T-Level: 30.7
TF below 2^97 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified (Factored)2017-09-22Oliver Kruse38D4F906977DBB6C1013
Verified (Factored)2017-10-12kkmrkkblmbrbk38D4F906977DBB6C123074713
Verified (Factored)2020-04-17Oliver Kruse7E9CF917B7541FC8120392853
Verified (Factored)2024-02-03Wentao Huang7E9CF917B7541FC8119850853
Verified2025-04-07Oliver Kruse7E9CF917B7541FC8222819253
History
DateUserTypeResult
2025-04-07JG48CERT
PRP Certification
Proof certified good
2025-04-07Oliver KruseC-PRP
M238151/92821203968491328357681/5393618481005868271386433790447 : 7E9CF917B7541FC8
PRP proof power = 5
PRP: Verified
Proof certified good
2025-04-07Oliver KruseF-ECM
Factor: 5393618481005868271386433790447 / (ECM curve 44, B1=930601, B2=1774656107, Edwards Sigma=5882034240774336)
2024-02-03Naegi MakotoCERT
PRP Certification
Proof certified good
2024-02-03Wentao HuangC-PRP
M238151/92821203968491328357681 : 7E9CF917B7541FC8
PRP proof power = 5
PRP: Verified (Factored)
Proof certified good
2022-04-03Oliver KruseNF-PM1
B1=30000000, B2=10120247026890
2021-07-15Oliver KruseNF-PM1
B1=30000000, B2=3000000000, E=24
2020-04-17Oliver KruseC-PRP
M238151/92821203968491328357681 : 7E9CF917B7541FC8
PRP: Verified (Factored)
PRP without proof (small exponent)
2017-10-12kkmrkkblmbrbkC-PRP
M238151/92821203968491328357681 : 38D4F906977DBB6C
PRP: Verified (Factored)
PRP without proof (small exponent)
2017-09-22Oliver KruseC-PRP
M238151/92821203968491328357681 : 38D4F906977DBB6C
PRP: Verified (Factored)
PRP without proof (not generated)
2017-09-22Oliver KruseC-PRP
M238151/92821203968491328357681 : 38D4F906977DBB6C
PRP without proof (not generated)