2 305 621 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
73023628313	11	36.1	old
9408261717697	13	43.1	2008-09-30 14:36:48
20849132712526199	17	54.2	2014-11-10 12:31:22

ECM

Digits	B1	Curves
25	50000	228 / 280

Estimated T-Level: 24.1 ⓘ

TF below 2^75 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-11	Oliver Kruse	C7784F4F8FC9E30E	3	0	1	3
Verified	2017-10-15	Yaroslav Berezhko	C7784F4F8FC9E30E	3	0	1	3
Verified	2017-10-30	Oliver Kruse	C7784F4F8FC9E30E	3	1787418	1	3

History

Date	User	Type	Result
2021-06-11	ViliamF	NF-PM1	B1=5000000, B2=505000000
2018-02-19	alpertron	NF-PM1	B1=500000, B2=15000000, E=12
2017-10-30	Oliver Kruse	C-PRP	M2305621/73023628313/9408261717697/20849132712526199 : C7784F4F8FC9E30E PRP: Verified PRP without proof (not generated)
2017-10-15	Yaroslav Berezhko	C-PRP	M2305621/73023628313/9408261717697/20849132712526199 : C7784F4F8FC9E30E PRP: Verified PRP without proof (not generated)
2017-10-11	Oliver Kruse	C-PRP	M2305621/known_factors : C7784F4F8FC9E30E PRP: Verified PRP without proof (not generated)
2014-11-10	TJAOI	F	Factor: 20849132712526199 / TF: 54-55
2008-09-30	markr	F	Factor: 9408261717697