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
173023Composite, with 5 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
5882783722.5old
19378577824.22008-07-27 10:49:33
581357281929.12008-07-27 10:49:34
342214167751454091754.92008-08-26 20:12:46
26618415915616154811961.22014-06-12 17:52:56
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
351000000203 / 1566
Estimated T-Level: 30.6
TF below 2^97 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-22Oliver Kruse5BDFEE04D7899CB55013
Verified2017-10-12kkmrkkblmbrbk5BDFEE04D7899CB557567813
Verified2020-04-17Oliver KruseE3C40D6ADB71D70259863453
Verified2024-02-03Wentao HuangE3C40D6ADB71D702513467253
History
DateUserTypeResult
2025-09-21masserNF-PM1
B1=230000000, B2=25287774411900
2024-02-03Naegi MakotoCERT
PRP Certification
Proof certified good
2024-02-03Wentao HuangC-PRP
M173023/5882783/19378577/581357281/34221416775145409/2661841591561615481 : E3C40D6ADB71D702
PRP proof power = 5
PRP: Verified
Proof certified good
2020-04-17Oliver KruseC-PRP
M173023/5882783/19378577/581357281/34221416775145409/2661841591561615481 : E3C40D6ADB71D702
PRP: Verified
PRP without proof (small exponent)
2017-10-12kkmrkkblmbrbkC-PRP
M173023/5882783/19378577/581357281/34221416775145409/2661841591561615481 : 5BDFEE04D7899CB5
PRP: Verified
PRP without proof (small exponent)
2017-09-22Oliver KruseC-PRP
M173023/5882783/19378577/581357281/34221416775145409/2661841591561615481 : 5BDFEE04D7899CB5
PRP without proof (not generated)
2017-05-26kkmrkkblmbrbkNF-PM1
B1=100000000, B2=2000000000, E=12
2014-06-12TJAOIF-ECM
Factor: 2661841591561615481
2008-08-26-Anonymous-F-PM1
Factor: 34221416775145409
2008-07-27J FeitsmaF
Factor: 581357281
2008-07-27J FeitsmaF
Factor: 19378577