9 277 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
469874220513915961	18	58.7	old
1761960954691966259428048925191	31	100.5	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	6671 / 16550

Estimated T-Level: 47.0 ⓘ

TF below 2^151 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	81A428C8D8BC6436	2	0	1	3
Verified	2017-10-02	kkmrkkblmbrbk	81A428C8D8BC6436	2	0	1	3
Verified	2017-12-07	ATH	81A428C8D8BC6436	2	6893	1	3
Verified	2020-04-17	Oliver Kruse	F01295938183AB56	2	4836	5	3
Verified	2024-07-01	kkmrkkblmbrbk	F01295938183AB56	2	9040	5	3

History

Date	User	Type	Result
2024-07-01	kkmrkkblmbrbk	C-PRP	M9277/1761960954691966259428048925191/469874220513915961 : F01295938183AB56 PRP: Verified PRP without proof (small exponent)
2023-07-09	JacobZ	NF-PM1	B1=62000000000, B2=254047854677867250
2021-12-16	Lisander Viaene	NF-PM1	B1=100000000
2020-04-17	Oliver Kruse	C-PRP	M9277/469874220513915961/1761960954691966259428048925191 : F01295938183AB56 PRP: Verified PRP without proof (small exponent)
2017-12-07	ATH	C-PRP	M9277/469874220513915961/1761960954691966259428048925191 : 81A428C8D8BC6436 PRP: Verified PRP without proof (small exponent)
2017-10-02	kkmrkkblmbrbk	C-PRP	M9277/469874220513915961/1761960954691966259428048925191 : 81A428C8D8BC6436 PRP: Verified PRP without proof (not generated)
2017-09-21	Oliver Kruse	C-PRP	M9277/known_factors : 81A428C8D8BC6436 PRP without proof (not generated)