8 707 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

Composite, with 2 known prime factors. Cofactor is composite.

Factored

Factor	Digits	Bits	Date
1193833654004911	16	50.1	old
526187181043556245572257	24	78.8	old

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	640 / 640
35	1000000	1566 / 1566
40	3000000	4588 / 4588
45	11000000	9201 / 9201
50	44000000	8058 / 16550

Estimated T-Level: 47.4 ⓘ

TF below 2^153 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	0B92015FADEA994E	2	0	1	3
Verified	2017-10-02	kkmrkkblmbrbk	0B92015FADEA994E	2	0	1	3
Verified	2017-12-07	ATH	0B92015FADEA994E	2	5862	1	3
Verified	2020-04-17	Oliver Kruse	68B6561B2E3EEC42	2	4063	5	3
Verified	2024-07-01	kkmrkkblmbrbk	68B6561B2E3EEC42	2	2217	5	3

History

Date	User	Type	Result
2024-07-01	kkmrkkblmbrbk	C-PRP	M8707/1193833654004911/526187181043556245572257 : 68B6561B2E3EEC42 PRP: Verified PRP without proof (small exponent)
2023-08-10	JacobZ	NF-PM1	B1=67000000000, B2=265422648792401100
2021-12-16	Lisander Viaene	NF-PM1	B1=100000000
2020-04-17	Oliver Kruse	C-PRP	M8707/1193833654004911/526187181043556245572257 : 68B6561B2E3EEC42 PRP: Verified PRP without proof (small exponent)
2017-12-07	ATH	C-PRP	M8707/1193833654004911/526187181043556245572257 : 0B92015FADEA994E PRP: Verified PRP without proof (small exponent)
2017-10-02	kkmrkkblmbrbk	C-PRP	M8707/1193833654004911/526187181043556245572257 : 0B92015FADEA994E PRP: Verified PRP without proof (not generated)
2017-09-21	Oliver Kruse	C-PRP	M8707/known_factors : 0B92015FADEA994E PRP without proof (not generated)