11 981 Exponent Status

Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

M_n

Status

Details

Composite, with 5 known prime factors. Cofactor is composite.

Factored

Factor	Digits	Bits	Date
4097503	7	22.0	old
13011367	8	23.6	2008-08-26 19:58:35
31947832408190118487	20	64.8	2008-08-29 02:24:28
1291168825343700846864666383	28	90.1	2008-11-22 12:25:27
3021088312289304674587648134421860233	37	121.2	2022-06-22 14:59:17

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	640 / 640
35	1000000	1566 / 1566
40	3000000	4588 / 4588
45	11000000	1251 / 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 (Factored)	2017-09-21	Oliver Kruse	24BE36751DD82D5A	4	0	1	3
Verified (Factored)	2017-10-02	kkmrkkblmbrbk	24BE36751DD82D5A	4	0	1	3
Verified (Factored)	2017-12-07	ATH	24BE36751DD82D5A	4	9182	1	3
Verified (Factored)	2020-04-17	Oliver Kruse	63B0E7B384F997CE	4	10200	5	3
Verified	2022-06-22	aperson1	63B0E7B384F997CE	5	5384	5	3

History

Date	User	Type	Result
2023-04-06	-Anonymous-	NF-PM1	B1=100000000000, B2=122192573512709700
2022-06-22	aperson1	C-PRP	M11981/4097503/13011367/31947832408190118487/1291168825343700846864666383/3021088312289304674587648134421860233 : 63B0E7B384F997CE PRP: Verified PRP without proof (small exponent)
2022-06-22	James Hintz	F-ECM	Factor: 3021088312289304674587648134421860233 / (ECM curve 1334, B1=3000000, B2=300000000, Sigma=950656630356138)
2020-04-17	Oliver Kruse	C-PRP	M11981/4097503/13011367/31947832408190118487/1291168825343700846864666383 : 63B0E7B384F997CE PRP: Verified PRP without proof (small exponent)
2017-12-07	ATH	C-PRP	M11981/4097503/13011367/31947832408190118487/1291168825343700846864666383 : 24BE36751DD82D5A PRP: Verified PRP without proof (small exponent)
2017-10-02	kkmrkkblmbrbk	C-PRP	M11981/4097503/13011367/31947832408190118487/1291168825343700846864666383 : 24BE36751DD82D5A PRP: Verified PRP without proof (not generated)
2017-09-21	Oliver Kruse	C-PRP	M11981/4097503/13011367/31947832408190118487/1291168825343700846864666383 : 24BE36751DD82D5A PRP: Verified PRP without proof (not generated)
2017-09-21	Oliver Kruse	C-PRP	M11981/4097503/13011367/31947832408190118487/1291168825343700846864666383 : 24BE36751DD82D5A PRP without proof (not generated)
2016-09-07	kkmrkkblmbrbk	NF-PM1	B1=100000000, B2=10000000000, E=12
2008-11-22	-Anonymous-	F-ECM	Factor: 1291168825343700846864666383
2008-08-29	-Anonymous-	F-ECM	Factor: 31947832408190118487
2008-08-26	-Anonymous-	F	Factor: 13011367