2 196 449 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

Composite, with 1 known prime factor. Cofactor is composite.

Factored

Factor	Digits	Bits	Date
15359565576962220121	20	63.7	old

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	164 / 640

Estimated T-Level: 26.3 ⓘ

TF below 2^82 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		David Linton	F5A8F8022BBB1036	0
Verified (Factored)	1999-02-14	Stellios Zographos	F5A8F8022BBB1036	377755

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-09	Oliver Kruse	3AF12967B1BA3E2A	1	0	1	3
Verified	2017-11-19	kkmrkkblmbrbk	3AF12967B1BA3E2A	1	225328	1	3

History

Date	User	Type	Result
2017-11-19	kkmrkkblmbrbk	C-PRP	M2196449/15359565576962220121 : 3AF12967B1BA3E2A PRP: Verified PRP without proof (not generated)
2017-10-09	Oliver Kruse	C-PRP	M2196449/15359565576962220121 : 3AF12967B1BA3E2A PRP: Verified PRP without proof (not generated)
2016-03-30	alpertron	NF-PM1	B1=500000, B2=15000000, E=12