15 537 733 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

Composite, with 3 known prime factors. Cofactor is composite.

Factored

Factor	Digits	Bits	Date
5189602823	10	32.3	old
53564501065007	14	45.6	2008-09-08 11:34:19
1972995724465267949192557839452460416639	40	130.5	2023-07-25 11:51:52

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2023-08-25	Ryan Propper	23C5FD81AECB965A	3	6865277	5	3

P-1 factors

Date	Factor	B1	B2
2023-07-25	1972995724465267949192557839452460416639	480000	308477400

History

Date	User	Type	Result
2023-08-25	curtisc	CERT	PRP Certification Proof certified good
2023-08-25	Ryan Propper	C-PRP	M15537733/5189602823/53564501065007/1972995724465267949192557839452460416639 : 23C5FD81AECB965A PRP proof power = 8 PRP: Verified Proof certified good
2023-07-25	nordi	F-PM1	Factor: 1972995724465267949192557839452460416639 / (P-1, B1=480000, B2=308477400)
2023-07-10	nordi	NF-PM1	B1=480000
2008-09-08	Will Edgington	F	Factor: 53564501065007