5 575 903 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
238683323086516863285950482033887411551	39	127.5	2022-09-10 11:41:44

ECM

Digits	B1	Curves
25	50000	9 / 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	Shift
Verified (Factored)		Brian Pinto	1D5A115C538620E0	0
Verified (Factored)	2000-09-08	Gordon M. Spence	1D5A115C538620E0	256785

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2022-09-16	Perig	DEDA206FEDCD909C	1	818036	5	3

P-1 factors

Date	Factor	B1	B2
2022-09-10	238683323086516863285950482033887411551	5000000	6423588990

History

Date	User	Type	Result
2022-09-16	theojk	CERT	PRP Certification Proof certified good
2022-09-16	Perig	C-PRP	M5575903/238683323086516863285950482033887411551 : DEDA206FEDCD909C PRP proof power = 7 PRP: Verified Proof certified good
2022-09-10	Sid & Andy	F-PM1	Factor: 238683323086516863285950482033887411551 / (P-1, B1=5000000, B2=6423588990)
2021-09-17	SRBase	NF	no factor from 2^71 to 2^72
2021-08-23	SRBase	NF	no factor from 2^70 to 2^71
2021-08-18	SRBase	NF	no factor from 2^69 to 2^70
2020-08-24	TJAOI	NF	no factor from 2^68 to 2^69
2019-10-15	USAFSS	NF-PM1	B1=335000, B2=9966250, E=12
2018-07-05	ramgeis	NF	no factor from 2^67 to 2^68
2016-07-31	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-02-23	Mark Rose	NF	no factor from 2^1 to 2^62
2015-09-03	snme2pm1	NF	no factor from 2^65 to 2^66
2014-12-21	monst	NF	no factor from 2^64 to 2^65
2014-12-20	Nesowa	NF	no factor from 2^63 to 2^64
2009-04-20	GrunwalderGIMP	NF	no factor from 2^62 to 2^63