6 287 Exponent Status

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

PrimeNet Exponent Status

M_n

Details

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

Trial Factored to 2⁶⁸

TF target 2⁴⁴

Factored

Factor	Digits	Bits	Date
5029601	7	22.3	old
5180489	7	22.3	old
57186553	8	25.8	old
511902522053537424083109350714318017	36	118.6	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	3287 / 16550

Estimated T-Level: 46.0 ⓘ

TF below 2^148 is very unlikely to find new factors due to ECM effort.

Status	Proof	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	No proof (small exponent)	2017-09-21	Oliver Kruse	66028E56313DB4C5	4	0	1	3
Verified	No proof (small exponent)	2017-10-02	kkmrkkblmbrbk	66028E56313DB4C5	4	0	1	3
Verified	No proof (small exponent)	2017-12-07	ATH	66028E56313DB4C5	4	4100	1	3
Verified	No proof (small exponent)	2020-04-17	Oliver Kruse	302E0F402523F61E	4	3487	5	3
Verified	No proof (small exponent)	2024-02-03	Wentao Huang	302E0F402523F61E	4	1579	5	3

History

Date	User	Type	Result
2025-03-19	masser	NF-PP1	Start=143/47, B1=1000000000, B2=999000000000
2025-03-10	masser	NF-PP1	Start=6/5, B1=1000000000, B2=999000000000
2025-03-02	masser	NF-PP1	Start=2/7, B1=1000000000, B2=999000000000
2024-02-03	Wentao Huang	C-PRP	M6287/5029601/5180489/57186553/511902522053537424083109350714318017 : 302E0F402523F61E
2023-08-03	-anonymous-	NF-PM1	B1=39000000000, B2=163113042636343800
2021-08-01	ViliamF	NF-PM1	B1=500000000, B2=90500000000
2020-04-17	Oliver Kruse	C-PRP	M6287/5029601/5180489/57186553/511902522053537424083109350714318017 : 302E0F402523F61E
2017-12-07	ATH	C-PRP	M6287/5029601/5180489/57186553/511902522053537424083109350714318017 : 66028E56313DB4C5
2017-10-02	kkmrkkblmbrbk	C-PRP	M6287/5029601/5180489/57186553/511902522053537424083109350714318017 : 66028E56313DB4C5
2017-09-21	Oliver Kruse	C-PRP	M6287/known_factors : 66028E56313DB4C5