5 381 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
48170713	8	25.5	old
8422404265321	13	42.9	old
96641109754921	14	46.5	old
1214110390283036717531167	25	80.0	old
152830303091942957757210998162769551305370831	45	146.8	2020-10-13 23:05:39

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	11294 / 16550

Estimated T-Level: 48.4 ⓘ

TF below 2^156 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	CDC4F10C74DE87BA	4	0	1	3
Verified (Factored)	2017-10-02	kkmrkkblmbrbk	CDC4F10C74DE87BA	4	0	1	3
Verified (Factored)	2017-12-07	ATH	CDC4F10C74DE87BA	4	4574	1	3
Verified (Factored)	2020-04-17	Oliver Kruse	563EDB84F5156108	4	2000	5	3
Verified	2020-10-13	M Miller	563EDB84F5156108	5	3754	5	3

History

Date	User	Type	Result
2023-07-06	-Anonymous-	NF-PM1	B1=58000000000, B2=237664709340158100
2022-01-24	Ethan O'Connor	NF-PM1	B1=1300000000
2022-01-24	Ethan O'Connor	NF-PM1	B1=520000000
2021-08-27	Seth_Tr	NF-PM1	B1=400000000
2021-08-27	Seth_Tr	NF-PM1	B1=100000000
2020-10-13	M Miller	C-PRP	M5381/48170713/8422404265321/96641109754921/1214110390283036717531167/152830303091942957757210998162769551305370831 : 563EDB84F5156108 PRP: Verified PRP without proof (small exponent)
2020-10-13	Ryan Propper	F-ECM	Factor: 152830303091942957757210998162769551305370831 / (ECM curve 1, B1=110000000, B2=900514153782, Sigma=11848218138657901342)
2020-04-17	Oliver Kruse	C-PRP	M5381/48170713/8422404265321/96641109754921/1214110390283036717531167 : 563EDB84F5156108 PRP: Verified PRP without proof (small exponent)
2017-12-07	ATH	C-PRP	M5381/48170713/8422404265321/96641109754921/1214110390283036717531167 : CDC4F10C74DE87BA PRP: Verified PRP without proof (small exponent)
2017-10-02	kkmrkkblmbrbk	C-PRP	M5381/48170713/8422404265321/96641109754921/1214110390283036717531167 : CDC4F10C74DE87BA PRP: Verified PRP without proof (not generated)
2017-09-21	Oliver Kruse	C-PRP	M5381/known_factors : CDC4F10C74DE87BA PRP without proof (not generated)