6 207 569 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
65403303008778185047	20	65.8	2013-04-02 23:11:27

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)	1998-11-21	Rick Rechowicz	48000369CD3C5FB6	0
Verified (Factored)	2002-01-08	Doug Shaw	48000369CD3C5FB6	251223

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-08	kkmrkkblmbrbk	BC7C1B346309650B	1	0	1	3
Verified	2018-09-22	rucio	BC7C1B346309650B	1	3043846	1	3

P-1 factors

Date	Factor	B1	B2
2013-04-02	65403303008778185047	115000	2271250

History

Date	User	Type	Result
2024-09-13	cramsey87	NF-PM1	B1=450000, B2=339536340
2018-09-22	rucio	C-PRP	M6207569/65403303008778185047 : BC7C1B346309650B PRP: Verified PRP without proof (not generated)
2017-10-08	kkmrkkblmbrbk	C-PRP	M6207569/65403303008778185047 : BC7C1B346309650B PRP: Verified PRP without proof (not generated)
2013-04-02	Squeeky_Squirrel	F	Factor: 65403303008778185047