15 929 621 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
1088856444128308830631697	25	79.8	2024-02-03 00:10:24
1419062965337596582086126340369	31	100.2	2020-12-28 11:16:35

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)	2002-07-27	Hubbell-prime	7E547FF35DB0CDFD	12894739
Verified (Factored)	2006-12-18	Matt Bassett	7E547FF35DB0CDFD	15285632

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2023-11-28	Ryan Propper	1ED3328ECA5111AD	1	1456121	5	3
Verified	2024-02-03	riccardo uberti	1ED3328ECA5111AD	2	2678763	5	3

P-1 factors

Date	Factor	B1	B2
2020-12-28	1419062965337596582086126340369	1500000	30000000
2024-02-03	1088856444128308830631697	8000000	20510448420

History

Date	User	Type	Result
2024-02-03	Kimon Berlin	CERT	PRP Certification Proof certified good
2024-02-03	riccardo uberti	C-PRP	M15929621/1088856444128308830631697/1419062965337596582086126340369 : 1ED3328ECA5111AD PRP proof power = 8 PRP: Verified Proof certified good
2024-02-03	riccardo uberti	F-PM1	Factor: 1088856444128308830631697 / (P-1, B1=8000000, B2=20510448420)
2023-11-28	riccardo uberti	CERT	PRP Certification Proof certified good
2023-11-28	Ryan Propper	C-PRP	M15929621/1419062965337596582086126340369 : 1ED3328ECA5111AD PRP proof power = 8 PRP: Verified (Factored) Proof certified good
2023-10-28	nordi	NF-PM1	B1=480000, B2=252748650
2023-08-30	nordi	NF-PM1	B1=480000
2020-12-28	Tha	F-PM1	Factor: 1419062965337596582086126340369 / (P-1, B1=1500000, B2=30000000, E=12)
2018-03-12	ramgeis	NF	no factor from 2^68 to 2^69
2018-03-12	ramgeis	NF	no factor from 2^67 to 2^68
2016-03-16	Mark Rose	NF	no factor from 2^65 to 2^66
2014-07-29	Nesowa	NF	no factor from 2^66 to 2^67