2 083 981 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
19449728278011374111	20	64.1	2009-11-04 23:14:07

ECM

Digits	B1	Curves
25	50000	104 / 280

Estimated T-Level: 21.9 ⓘ

TF below 2^68 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)	1997-12-30	Fumitaka Hayashi	18ACF941966AAC68	0
Verified (Factored)	1999-03-01	James Callahan	18ACF941966AAC68	1597545

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-06	Oliver Kruse	5BC5E9C0CF2D7D0C	1	0	1	3
Verified	2017-11-16	kkmrkkblmbrbk	5BC5E9C0CF2D7D0C	1	1191361	1	3

History

Date	User	Type	Result
2022-03-09	LordJulius	NF	no factor from 2^1 to 2^60
2017-11-16	kkmrkkblmbrbk	C-PRP	M2083981/19449728278011374111 : 5BC5E9C0CF2D7D0C PRP: Verified PRP without proof (not generated)
2017-10-06	Oliver Kruse	C-PRP	M2083981/19449728278011374111 : 5BC5E9C0CF2D7D0C PRP: Verified PRP without proof (not generated)
2016-03-16	alpertron	NF-PM1	B1=500000, B2=15000000, E=12
2009-11-04	SubPrime	F-ECM	Factor: 19449728278011374111
2009-07-26	USAFSS	NF-PM1	B1=20000, B2=260000
2009-01-02	Sturle Sunde	NF	no factor from 2^60 to 2^61