11 491 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
7646938753	10	32.8	old
575865804591108063324617025817	30	98.9	2015-08-15 09:09:16

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	640 / 640
35	1000000	1566 / 1566
40	3000000	4588 / 4588
45	11000000	1290 / 9201

Estimated T-Level: 40.7 ⓘ

TF below 2^130 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-21	Oliver Kruse	91D64F2AFB254626	2	0	1	3
Verified	2017-10-02	kkmrkkblmbrbk	91D64F2AFB254626	2	0	1	3
Verified	2017-12-07	ATH	91D64F2AFB254626	2	7068	1	3
Unverified	2020-04-17	Oliver Kruse	1CB804D8FBF868__	2	3942	5	3

P-1 factors

Date	Factor	B1	B2
2023-01-20	575865804591108063324617025817	100000000000	122192573512709696

History

Date	User	Type	Result
2023-01-20	-Anonymous-	F-PM1	Factor: 575865804591108063324617025817 / (P-1, B1=100000000000, B2=122192573512709700)
2020-04-17	Oliver Kruse	C-PRP	M11491/7646938753/575865804591108063324617025817 : 1CB804D8FBF868__ PRP without proof (small exponent)
2017-12-07	ATH	C-PRP	M11491/7646938753/575865804591108063324617025817 : 91D64F2AFB254626 PRP without proof (small exponent)
2017-10-02	kkmrkkblmbrbk	C-PRP	M11491/7646938753/575865804591108063324617025817 : 91D64F2AFB254626 PRP without proof (not generated)
2017-09-21	Oliver Kruse	C-PRP	M11491/7646938753/575865804591108063324617025817 : 91D64F2AFB254626 PRP without proof (not generated)
2016-09-07	kkmrkkblmbrbk	NF-PM1	B1=100000000, B2=10000000000, E=12
2015-08-15	BloodIce	F-ECM	Factor: 575865804591108063324617025817 / (ECM curve 30, B1=1000000, B2=100000000)