2 497 289 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
211609895178237977233	21	67.5	2009-04-29 18:42:13

ECM

Digits	B1	Curves
25	50000	58 / 280

Estimated T-Level: 21.0 ⓘ

TF below 2^65 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Ari Orn	7F63FF31A0601E6E	0
Verified (Factored)	1999-05-02	S05770	7F63FF31A0601E6E	2137666

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-14	kkmrkkblmbrbk	B1776E3727276EDA	1	785545	5	3
Verified	2017-11-07	Oliver Kruse	B1776E3727276EDA	1	1620381	5	3

History

Date	User	Type	Result
2022-03-10	LordJulius	NF	no factor from 2^1 to 2^60
2019-07-04	alpertron	NF-PM1	B1=2000000, B2=60000000, E=12
2017-11-07	Oliver Kruse	C-PRP	M2497289/211609895178237977233 : B1776E3727276EDA PRP: Verified PRP without proof (not generated)
2017-10-14	kkmrkkblmbrbk	C-PRP	M2497289/211609895178237977233 : B1776E3727276EDA PRP: Verified PRP without proof (not generated)
2009-04-29	Aca Arsov	F-ECM	Factor: 211609895178237977233
2009-01-11	Sturle Sunde	NF	no factor from 2^60 to 2^61