Marin Mersenne 2^P-1
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Finding World Record Primes Since 1996

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MnStatusDetails
288571Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
52801127724536013476472272.22009-09-02 01:37:27
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
351000000211 / 1566
Estimated T-Level: 30.7
TF below 2^97 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Unknown58D40
Verified (Factored)Matt Fischer38B7DB9C693ED8D40
Verified (Factored)Brian J. Beesley38B7DB9C693ED8D40
Verified (Factored)Eivind Triel38B7DB9C693ED8D420682
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-24Oliver KruseC518FD24CC2873331013
Verified2017-10-12Oliver KruseC518FD24CC287333118963513
Verified2017-11-06kkmrkkblmbrbkC518FD24CC287333126867313
Verified2020-04-17Oliver Kruse461A6C156F0CE00118816353
Verified2024-08-14kkmrkkblmbrbk461A6C156F0CE001126093753
History
DateUserTypeResult
2024-11-18yuriy_5-1NF-PM1
B1=26548532, B2=6490139666010
2024-08-14Luke DurantCERT
PRP Certification
Proof certified good
2024-08-14kkmrkkblmbrbkC-PRP
M288571/5280112772453601347647 : 461A6C156F0CE001
PRP proof power = 5
PRP: Verified
Proof certified good
2023-02-17USAFSSNF-PM1
B1=4000000, B2=17366131860
2022-03-07LordJuliusNF
no factor from 2^54 to 2^55
2020-04-17Oliver KruseC-PRP
M288571/5280112772453601347647 : 461A6C156F0CE001
PRP: Verified
PRP without proof (small exponent)
2017-11-06kkmrkkblmbrbkC-PRP
M288571/5280112772453601347647 : C518FD24CC287333
PRP: Verified
PRP without proof (small exponent)
2017-10-12Oliver KruseC-PRP
M288571/5280112772453601347647 : C518FD24CC287333
PRP: Verified
PRP without proof (small exponent)
2017-09-24Oliver KruseC-PRP
M288571/5280112772453601347647 : C518FD24CC287333
PRP: Verified
PRP without proof (not generated)
2017-09-22Oliver KruseC-PRP
M288571/5280112772453601347647 : C518FD24CC287333
PRP without proof (not generated)
2009-09-02Sturle SundeF-ECM
Factor: 5280112772453601347647
2009-01-25Sturle SundeNF
no factor from 2^59 to 2^60
2009-01-02Sturle SundeNF
no factor from 2^58 to 2^59