8 147 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

Composite, with 1 known prime factor. Cofactor is composite.

Factored

Factor	Digits	Bits	Date
2095869993976940082305137	25	80.8	old

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	640 / 640
35	1000000	1566 / 1566
40	3000000	4588 / 4588
45	11000000	6537 / 9201

Estimated T-Level: 43.6 ⓘ

TF below 2^140 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	AD48BDD006ACE582	1	0	1	3
Verified	2017-10-12	kkmrkkblmbrbk	AD48BDD006ACE582	1	7173	1	3
Verified	2020-04-17	Oliver Kruse	8F82630E65C59E1F	1	847	5	3
Verified	2024-07-01	kkmrkkblmbrbk	8F82630E65C59E1F	1	4694	5	3

History

Date	User	Type	Result
2024-07-01	kkmrkkblmbrbk	C-PRP	M8147/2095869993976940082305137 : 8F82630E65C59E1F PRP: Verified PRP without proof (small exponent)
2023-06-04	JacobZ	NF-PM1	B1=72000000000, B2=300970872589336950
2021-12-16	Lisander Viaene	NF-PM1	B1=100000000
2020-04-17	Oliver Kruse	C-PRP	M8147/2095869993976940082305137 : 8F82630E65C59E1F PRP: Verified PRP without proof (small exponent)
2017-10-12	kkmrkkblmbrbk	C-PRP	M8147/2095869993976940082305137 : AD48BDD006ACE582 PRP: Verified PRP without proof (not generated)
2017-09-21	Oliver Kruse	C-PRP	M8147/2095869993976940082305137 : AD48BDD006ACE582 PRP: Verified PRP without proof (not generated)
2017-09-21	Oliver Kruse	C-PRP	M8147/2095869993976940082305137 : AD48BDD006ACE582 PRP without proof (not generated)