4 903 949 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
46660580122538498839721	23	75.3	2014-09-09 20:07:45

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)		Michael E. Carboy	536AA8C7ECC3B31D	0
Verified (Factored)	2000-10-15	Alan Vidmar	536AA8C7ECC3B31D	4252443

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-20	kkmrkkblmbrbk	3F10AA24FB2CABE2	1	0	1	3
Verified	2018-04-06	trebor	3F10AA24FB2CABE2	1	4507604	1	3

P-1 factors

Date	Factor	B1	B2
2014-09-09	46660580122538498839721	1200000	0

History

Date	User	Type	Result
2021-09-26	Dylan Delgado	NF-PM1	B1=2350000, B2=213850000
2018-04-06	trebor	C-PRP	M4903949/46660580122538498839721 : 3F10AA24FB2CABE2 PRP: Verified PRP without proof (not generated)
2017-09-20	kkmrkkblmbrbk	C-PRP	M4903949/46660580122538498839721 : 3F10AA24FB2CABE2 PRP: Verified PRP without proof (not generated)
2014-09-09	mikr	F-PM1	Factor: 46660580122538498839721 / (P-1, B1=1200000)
2011-08-27	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2011-07-18	USAFSS	NF-PM1	B1=60000, B2=960000, E=6
2010-04-10	markr	NF	no factor from 2^61 to 2^62