8 025 527 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
21320861951194314401	20	64.2	2013-09-01 07:18:48

ECM

Digits	B1	Curves
25	50000	3 / 280

Estimated T-Level: 20.1 ⓘ

TF below 2^62 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)	1999-12-08	Bruce M. Juba	DE0231A08DC31E2B	5361581
Verified (Factored)	2002-11-09	Rick Cummings	DE0231A08DC31E2B	2823772

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2018-07-27	_p95holder_	399F8CB0D2F5FA6A	1	7423909	5	3
Verified	2020-01-02	oodaira	399F8CB0D2F5FA6A	1	217869	5	3

History

Date	User	Type	Result
2020-01-02	oodaira	C-PRP	M8025527/21320861951194314401 : 399F8CB0D2F5FA6A PRP: Verified PRP without proof (not generated)
2018-07-27	_p95holder_	C-PRP	M8025527/21320861951194314401 : 399F8CB0D2F5FA6A PRP: Verified PRP without proof (not generated)
2013-09-01	David Campeau	F	Factor: 21320861951194314401 / TF: 64-65
2013-08-25	David Campeau	NF	no factor from 2^63 to 2^64
2012-04-17	Squeeky_Squirrel	NF-PM1	B1=100000, B2=1950000, E=6