9 521 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
361799	6	18.5	old
2935942905394292585908884339571206271	37	121.1	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	6716 / 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	4DC51C9919898372	2	0	1	3
Verified	2017-10-02	kkmrkkblmbrbk	4DC51C9919898372	2	0	1	3
Verified	2017-12-07	ATH	4DC51C9919898372	2	2647	1	3
Verified	2020-04-17	Oliver Kruse	B898F62CDEA2123E	2	5046	5	3
Verified	2024-07-01	kkmrkkblmbrbk	B898F62CDEA2123E	2	3740	5	3

History

Date	User	Type	Result
2024-07-01	kkmrkkblmbrbk	C-PRP	M9521/2935942905394292585908884339571206271/361799 : B898F62CDEA2123E PRP: Verified PRP without proof (small exponent)
2023-06-27	JacobZ	NF-PM1	B1=61000000000, B2=254995794420917550
2022-01-03	Lisander Viaene	NF-PM1	B1=100000000
2020-04-17	Oliver Kruse	C-PRP	M9521/361799/2935942905394292585908884339571206271 : B898F62CDEA2123E PRP: Verified PRP without proof (small exponent)
2017-12-07	ATH	C-PRP	M9521/361799/2935942905394292585908884339571206271 : 4DC51C9919898372 PRP: Verified PRP without proof (small exponent)
2017-10-02	kkmrkkblmbrbk	C-PRP	M9521/361799/2935942905394292585908884339571206271 : 4DC51C9919898372 PRP: Verified PRP without proof (not generated)
2017-09-21	Oliver Kruse	C-PRP	M9521/known_factors : 4DC51C9919898372 PRP without proof (not generated)