5 387 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

Composite, with 4 known prime factors. Cofactor is composite.

Factored

Factor	Digits	Bits	Date
35028913631	11	35.0	old
20890514064241	14	44.2	old
23318981546952847321	20	64.3	old
121180963479604713799	21	66.7	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	11675 / 16550

Estimated T-Level: 48.5 ⓘ

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	2017-09-21	Oliver Kruse	8C3F63501DD960AC	4	0	1	3
Verified	2017-10-02	kkmrkkblmbrbk	8C3F63501DD960AC	4	0	1	3
Verified	2017-12-07	ATH	8C3F63501DD960AC	4	2026	1	3
Verified	2020-04-17	Oliver Kruse	9040B2A5D760F6F8	4	5132	5	3
Verified	2024-02-03	Wentao Huang	9040B2A5D760F6F8	4	4453	5	3

History

Date	User	Type	Result
2023-07-07	-Anonymous-	NF-PM1	B1=58000000000, B2=237664709340158100
2022-01-24	Ethan O'Connor	NF-PM1	B1=1300000000
2021-12-16	Oliver Kruse	NF-PM1	B1=1000000000, B2=1002849399191640
2020-04-17	Oliver Kruse	C-PRP	M5387/35028913631/20890514064241/23318981546952847321/121180963479604713799 : 9040B2A5D760F6F8 PRP: Verified PRP without proof (small exponent)
2017-12-07	ATH	C-PRP	M5387/35028913631/20890514064241/23318981546952847321/121180963479604713799 : 8C3F63501DD960AC PRP: Verified PRP without proof (small exponent)
2017-10-02	kkmrkkblmbrbk	C-PRP	M5387/35028913631/20890514064241/23318981546952847321/121180963479604713799 : 8C3F63501DD960AC PRP: Verified PRP without proof (not generated)
2017-09-21	Oliver Kruse	C-PRP	M5387/known_factors : 8C3F63501DD960AC PRP without proof (not generated)