4 842 923 Exponent Status

Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
9685847	7	23.2	old
15933216671	11	33.9	2008-09-08 00:15:21
7385451259828409	16	52.7	2014-08-21 11:33:35
154509699534599694846049	24	77.0	2021-07-20 08:42:19
15371117823267478820386441	26	83.7	2021-07-20 08:42:19

ECM

Digits	B1	Curves
25	50000	13 / 280

Estimated T-Level: 20.2 ⓘ

TF below 2^62 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-11-20	kkmrkkblmbrbk	C2BD514719F18D0B	3	2897561	5	3
Verified (Factored)	2018-03-30	kracker	C2BD514719F18D0B	3	1191442	5	3
Verified	2021-07-20	ATH	C2BD514719F18D0B	5	1506933	5	3

P-1 factors

Date	Factor	B1	B2
2023-11-04	17540349227429963081689096644617898740655202703308051966070090081	1200000	589842540

History

Date	User	Type	Result
2023-11-04	USAFSS	F-PM1	Factors: 7385451259828409,15371117823267478820386441,154509699534599694846049 / (P-1, B1=1200000, B2=589842540)
2021-07-20	Ben Delo	CERT	PRP Certification Proof certified good
2021-07-20	ATH	C-PRP	M4842923/9685847/15933216671/7385451259828409/15371117823267478820386441/154509699534599694846049 : C2BD514719F18D0B PRP proof power = 7 PRP: Verified Proof certified good
2021-07-20	ATH	F-PP1	Start=2/7, B1=500000, B2=50000000, Factor: 2374986796383988246788243183378958508858182021609
2018-03-30	kracker	C-PRP	M4842923/9685847/15933216671/7385451259828409 : C2BD514719F18D0B PRP: Verified (Factored) PRP without proof (not generated)
2017-11-20	kkmrkkblmbrbk	C-PRP	M4842923/9685847/15933216671/7385451259828409 : C2BD514719F18D0B PRP: Verified (Factored) PRP without proof (not generated)
2014-08-21	TJAOI	F	Factor: 7385451259828409
2008-09-08	Will Edgington	F	Factor: 15933216671