1 243 789 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
2487507909344522364591282463	28	91.0	2015-01-08 07:48:24

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	104 / 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)		Joel Armengaud	4C906D22A162BB4B	0
Verified (Factored)		Cornelius Caesar	4C906D22A162BB4B	0
Verified (Factored)		Ricardo Montiel	4C906D22A162BB4B	0

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-29	Oliver Kruse	E434750C27BAC55D	1	0	1	3
Verified	2017-10-20	kkmrkkblmbrbk	E434750C27BAC55D	1	951070	1	3

P-1 factors

Date	Factor	B1	B2
2015-01-08	2487507909344522364591282463	4218475	0

History

Date	User	Type	Result
2022-03-07	LordJulius	NF	no factor from 2^58 to 2^60
2017-10-20	kkmrkkblmbrbk	C-PRP	M1243789/2487507909344522364591282463 : E434750C27BAC55D PRP: Verified PRP without proof (not generated)
2017-09-29	Oliver Kruse	C-PRP	M1243789/2487507909344522364591282463 : E434750C27BAC55D PRP: Verified PRP without proof (not generated)
2015-01-08	mikr	F-PM1	Factor: 2487507909344522364591282463 / (P-1, B1=4218475)
2014-09-25	Joss	NF-PM1	B1=251603
2012-11-13	dbaugh	NF	no factor from 2^62 to 2^63
2011-05-09	Xyzzy	NF	no factor from 2^61 to 2^62
2009-02-26	Sturle Sunde	NF	no factor from 2^60 to 2^61