6 629 387 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
77636297073820460990873	23	76.0	2020-06-30 20:33:38

ECM

Digits	B1	Curves
25	50000	6 / 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)	1999-08-31	Didier TOULLER	21432430C9864924	3325629
Verified (Factored)	2001-09-30	Samuel Elias	21432430C9864924	2725530

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2020-07-01	Christoph Zenger	6DFD5E9201BE4225	1	2238973	5	3
Verified	2020-07-04	oodaira	6DFD5E9201BE4225	1	334533	5	3

P-1 factors

Date	Factor	B1	B2
2020-06-30	77636297073820460990873	1000000	23000000

History

Date	User	Type	Result
2020-07-04	oodaira	C-PRP	M6629387/77636297073820460990873 : 6DFD5E9201BE4225 PRP: Verified PRP without proof (not generated)
2020-07-01	Christoph Zenger	C-PRP	M6629387/77636297073820460990873 : 6DFD5E9201BE4225 PRP: Verified PRP without proof (not generated)
2020-06-30	takahashi	F-PM1	Factor: 77636297073820460990873 / (P-1, B1=1000000, B2=23000000, E=12)
2020-05-15	TJAOI	NF	no factor from 2^68 to 2^69
2019-02-25	takahashi	NF-PM1	B1=250000, B2=4400000, E=6
2018-02-27	-Anonymous-	NF	no factor from 2^67 to 2^68
2016-04-15	Gordon Spence	NF	no factor from 2^66 to 2^67
2015-11-05	snme2pm1	NF	no factor from 2^65 to 2^66
2014-07-13	lycorn	NF	no factor from 2^64 to 2^65
2014-06-29	Nesowa	NF	no factor from 2^63 to 2^64
2012-02-27	kurly	NF-PM1	B1=80000, B2=1340000, E=6