15 711 923 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
22873067175869025417857431	26	84.2	2016-12-27 08:03:52

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	2908192F2B094A4E	3526831
Verified (Factored)	2006-02-15	Marc Getty / Phil Fizur	2908192F2B094A4E	6087658

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2023-09-20	Ryan Propper	F129E7536F6FB904	1	4351369	5	3

History

Date	User	Type	Result
2023-09-23	ari.orn	CERT	PRP Certification Proof certified good
2023-09-20	Ryan Propper	C-PRP	M15711923/22873067175869025417857431 : F129E7536F6FB904 PRP proof power = 8 PRP: Verified Proof certified good
2023-08-21	nordi	NF-PM1	B1=480000, B2=264402600
2023-08-02	nordi	NF-PM1	B1=480000
2016-12-27	ATH	F-ECM	Factor: 22873067175869025417857431 / (ECM curve 1, B1=50000, B2=5000000)
2016-03-16	Mark Rose	NF	no factor from 2^65 to 2^66
2015-11-28	Tha	NF-PM1	B1=300000, B2=6000000, E=12
2014-07-10	Nesowa	NF	no factor from 2^66 to 2^67