27 165 367 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 2⁷²

TF target 2⁷⁰

Factored

Factor	Digits	Bits	Date
55385239216207	14	45.7	old

Status	Proof	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	Not Uploaded	2021-07-01	Paul Underwood	9449B166C1AC9EB8	1	4562163	5	3
Verified	Certified Good	2021-09-17	LaurV	9449B166C1AC9EB8	1	3068981	5	3

History

Date	User	Type	Result
2022-04-15	masser	NF-PM1	B1=400000, B2=48871200
2022-03-03	masser	NF	no factor TF: 71-72
2022-03-03	masser	NF	no factor TF: 68-69
2022-03-03	masser	NF	no factor TF: 69-70
2022-03-03	masser	NF	no factor TF: 70-71
2022-02-26	masser	NF	no factor TF: 67-68
2021-09-17	Greg	CERT	Proof certified good
2021-09-17	LaurV	C-PRP	M27165367/55385239216207 : 9449B166C1AC9EB8 Proof Certified Good Proof Power: 9
2021-07-01	Paul Underwood	C-PRP	M27165367/55385239216207 : 9449B166C1AC9EB8 Proof Not Uploaded Proof Power: 9