M42

From Prime-Wiki
Jump to: navigation, search
M42
Prime class :
Type : Mersenne prime
Formula : Mn = 2n - 1
Prime data :
Rank : 42
n-value : 25,964,951
Number : 122164630061...280577077247
Digits : 7,816,230
Perfect number : 225,964,950 • (225,964,951-1)
Digits : 15,632,458
Discovery data :
Date of Discovery : 2005-02-18
Discoverer : Martin Nowak
Found with : Lucas-Lehmer test / Prime95 on 2.4 GHz Pentium 4 PC
Credits : George Woltman et. al.
GIMPS

M42 refers to the 42nd Mersenne prime 225,964,951-1.

M42 was discovered to be prime on 2005-02-18 by Martin Nowak, using Prime95 written by George Woltman. At time of its discovery, it was the largest known prime number. The number is 7,816,230 decimal digits long. This prime number was the eighth record prime found by the GIMPS project.

External links