4 251 809 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
29581968470029652590663	23	74.6	2013-02-16 16:53:35

ECM

Digits	B1	Curves
25	50000	5 / 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
Bad	1998-10-04	Robert Clark	042053D16192893A	0
Verified (Factored)	2000-01-19	Geoff Wing	0D6B3FCB378A56FC	2290402
Verified (Factored)	2000-12-31	Marc Getty / Phil Fizur	0D6B3FCB378A56FC	633035

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-20	kkmrkkblmbrbk	CF81CE7588DC884D	1	0	1	3
Verified	2018-01-22	ATH	CF81CE7588DC884D	1	2328482	1	3

History

Date	User	Type	Result
2023-03-09	USAFSS	NF-PM1	B1=224000, B2=119776800
2018-01-22	ATH	C-PRP	M4251809/29581968470029652590663 : CF81CE7588DC884D PRP: Verified PRP without proof (not generated)
2017-09-20	kkmrkkblmbrbk	C-PRP	M4251809/29581968470029652590663 : CF81CE7588DC884D PRP: Verified PRP without proof (not generated)
2013-02-16	Xyzzy	F-ECM	Factor: 29581968470029652590663
2012-01-31	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2011-01-09	markr	NF	no factor from 2^61 to 2^62
2009-11-09	USAFSS	NF-PM1	B1=55000, B2=976250, E=6