7 487 Exponent Status

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

PrimeNet Exponent Status

M_n

Details

Composite, with 1 known prime factor. Cofactor is composite.

Trial Factored to 2⁶⁸

TF target 2⁴⁴

Factored

Factor	Digits	Bits	Date
179689	6	17.5	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	11280 / 16550

Estimated T-Level: 48.4 ⓘ

TF below 2^156 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	A05AAA86C0088823	1	0	1	3
Verified	No proof (small exponent)	2017-10-12	kkmrkkblmbrbk	A05AAA86C0088823	1	7042	1	3
Verified	No proof (small exponent)	2020-04-17	Oliver Kruse	CDC6C195E6DFD9B5	1	720	5	3
Verified	No proof (small exponent)	2024-02-03	Wentao Huang	CDC6C195E6DFD9B5	1	7412	5	3

History

Date	User	Type	Result
2025-04-09	masser	NF-PP1	Start=134/11, B1=830000000, B2=829170000000
2025-03-27	masser	NF-PP1	Start=6/5, B1=830000000, B2=829170000000
2025-03-18	masser	NF-PP1	Start=2/7, B1=830000000, B2=829170000000
2024-02-03	Wentao Huang	C-PRP	M7487/179689 : CDC6C195E6DFD9B5
2023-09-02	-anonymous-	NF-PM1	B1=40000000000, B2=169617550478676300
2021-07-05	ViliamF	NF-PM1	B1=1000000000, B2=201000000000
2020-04-17	Oliver Kruse	C-PRP	M7487/179689 : CDC6C195E6DFD9B5
2017-10-12	kkmrkkblmbrbk	C-PRP	M7487/179689 : A05AAA86C0088823
2017-09-21	Oliver Kruse	C-PRP	M7487/179689 : A05AAA86C0088823
2017-09-21	Oliver Kruse	C-PRP	M7487/179689 : A05AAA86C0088823