15 525 893 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
3153104015196558910212403239769577245783	40	131.2	2022-04-09 03:50:29

ECM

Digits	B1	Curves
25	50000	1 / 280

Estimated T-Level: 20.0 ⓘ

TF below 2^61 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)	2002-08-03	C. Cooper / S. Boone	E28B9C8D47F451BB	10166867
Verified (Factored)	2005-12-12	nl16116	E28B9C8D47F451BB	4622128

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2022-11-09	Naegi Makoto	008313B01345DF8F	1	8265634	5	3

P-1 factors

Date	Factor	B1	B2
2022-04-09	3153104015196558910212403239769577245783	1500000	741128430

History

Date	User	Type	Result
2022-11-10	curtisc	CERT	PRP Certification Proof certified good
2022-11-09	Naegi Makoto	C-PRP	M15525893/3153104015196558910212403239769577245783 : 008313B01345DF8F PRP proof power = 8 PRP: Verified Proof certified good
2022-04-09	Sid & Andy	F-PM1	Factor: 3153104015196558910212403239769577245783 / (P-1, B1=1500000, B2=741128430)
2022-01-21	Anton Repko	NF	no factor from 2^72 to 2^74
2021-09-14	-Anonymous-	NF	no factor from 2^71 to 2^72
2021-09-08	SRBase	NF	no factor from 2^70 to 2^71
2021-06-03	lycorn	NF	no factor from 2^69 to 2^70
2018-03-23	ramgeis	NF	no factor from 2^68 to 2^69
2018-03-23	ramgeis	NF	no factor from 2^67 to 2^68
2016-05-09	Tha	NF-PM1	B1=300000, B2=6000000, E=12
2013-12-28	Nesowa	NF	no factor from 2^66 to 2^67
2013-10-07	David Campeau	NF	no factor from 2^65 to 2^66