1 918 537 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
1399166912079670326361	22	70.2	2009-08-02 11:58:24

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	106 / 640

Estimated T-Level: 25.8 ⓘ

TF below 2^81 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Robert Friberg	932BF001146560EB	0
Verified (Factored)	1999-03-15	Kent Lee	932BF001146560EB	281205

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-04	Oliver Kruse	A7A76A471300B6A3	1	0	1	3
Verified	2017-11-09	kkmrkkblmbrbk	A7A76A471300B6A3	1	586589	1	3

History

Date	User	Type	Result
2022-03-09	LordJulius	NF	no factor from 2^1 to 2^60
2017-11-09	kkmrkkblmbrbk	C-PRP	M1918537/1399166912079670326361 : A7A76A471300B6A3 PRP: Verified PRP without proof (not generated)
2017-10-04	Oliver Kruse	C-PRP	M1918537/1399166912079670326361 : A7A76A471300B6A3 PRP: Verified PRP without proof (not generated)
2016-03-17	alpertron	NF-PM1	B1=500000, B2=15000000, E=12
2009-08-02	SubPrime	F-ECM	Factor: 1399166912079670326361
2009-06-02	Architects Cubed	NF	no factor from 2^60 to 2^61