438 001 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
2604689628541858687631	22	71.1	2009-07-27 07:44:13

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	200 / 640

Estimated T-Level: 26.6 ⓘ

TF below 2^83 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		David Slowinski	53B	0
Verified (Factored)		Michael J. Kilfoyle	093F4F2DDAF2853B	0
Verified (Factored)		Eivind Triel	093F4F2DDAF2853B	268373
Verified (Factored)	2002-01-22	Dennis Pope	093F4F2DDAF2853B	65370

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-24	Oliver Kruse	928EA59812EFFBB6	1	0	1	3
Verified	2017-09-24	Oliver Kruse	928EA59812EFFBB6	1	0	1	3
Verified	2017-11-09	kkmrkkblmbrbk	928EA59812EFFBB6	1	313959	1	3
Unverified (Reliable)	2020-04-18	Oliver Kruse	9A85D5024414B0__	1	83752	5	3

History

Date	User	Type	Result
2020-04-18	Oliver Kruse	C-PRP	M438001/2604689628541858687631 : 9A85D5024414B0__ PRP: Unverified (Reliable) PRP without proof (small exponent)
2017-11-09	kkmrkkblmbrbk	C-PRP	M438001/2604689628541858687631 : 928EA59812EFFBB6 PRP: Unverified (Reliable) PRP without proof (small exponent)
2017-09-24	Oliver Kruse	C-PRP	M438001/2604689628541858687631 : 928EA59812EFFBB6 PRP: Unverified (Reliable) PRP without proof (not generated)
2017-09-24	Oliver Kruse	C-PRP	M438001/2604689628541858687631 : 928EA59812EFFBB6 PRP: Unverified (Reliable) PRP without proof (not generated)
2016-03-17	alpertron	NF-PM1	B1=3000000, B2=100000000, E=12
2009-07-27	JimBa	F-ECM	Factor: 2604689628541858687631