2 665 433 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

Composite, with 2 known prime factors. Cofactor is composite.

Factored

Factor	Digits	Bits	Date
12899271447726260503	20	63.5	old
473474789381484118804921	24	78.6	2019-05-12 02:17:49

ECM

Digits	B1	Curves
25	50000	64 / 280

Estimated T-Level: 21.1 ⓘ

TF below 2^65 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)	1997-12-13	James Griffin	8BAAD56ADDF798A1	0
Verified (Factored)	1999-05-23	Michael Beight	8BAAD56ADDF798A1	1584518

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-10-18	Oliver Kruse	188C29F5531D379D	1	1844365	5	3
Verified (Factored)	2017-12-03	kkmrkkblmbrbk	188C29F5531D379D	1	1911633	5	3
Verified	2019-05-12	artorollo	188C29F5531D379D	2	1385856	5	3

P-1 factors

Date	Factor	B1	B2
2019-05-12	473474789381484118804921	2000000	60000000

History

Date	User	Type	Result
2019-05-12	artorollo	C-PRP	M2665433/12899271447726260503/473474789381484118804921 : 188C29F5531D379D PRP: Verified PRP without proof (not generated)
2019-05-12	alpertron	F-PM1	Factor: 473474789381484118804921 / (P-1, B1=2000000, B2=60000000, E=12)
2017-12-03	kkmrkkblmbrbk	C-PRP	M2665433/12899271447726260503 : 188C29F5531D379D PRP: Verified PRP without proof (not generated)
2017-10-18	Oliver Kruse	C-PRP	M2665433/12899271447726260503 : 188C29F5531D379D PRP: Verified PRP without proof (not generated)