4 247 513 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
34393831146370040231	20	64.9	2013-02-14 11:34:34

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)		Paul Victor Novarese	F5D791139B53BAFA	0
Verified (Factored)	1998-06-14	Blaine Deal	F5D791139B53BAFA	0

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-20	kkmrkkblmbrbk	5908F684B962DF13	1	0	1	3
Verified	2018-01-22	ATH	5908F684B962DF13	1	3461983	1	3

History

Date	User	Type	Result
2023-03-09	USAFSS	NF-PM1	B1=224000, B2=119776800
2018-01-22	ATH	C-PRP	M4247513/34393831146370040231 : 5908F684B962DF13 PRP: Verified PRP without proof (not generated)
2017-09-20	kkmrkkblmbrbk	C-PRP	M4247513/34393831146370040231 : 5908F684B962DF13 PRP: Verified PRP without proof (not generated)
2013-02-14	S00030	F-ECM	Factor: 34393831146370040231
2012-01-31	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2011-08-17	Squeeky_Squirrel	NF-PM1	B1=50000, B2=762500, E=6
2011-01-12	markr	NF	no factor from 2^61 to 2^62
2009-08-04	Carsten Kossendey	NF-PM1	B1=25000, B2=337500