Every Day Counts
Mersenne Prime Exponent Days
 
Age: 25,376 days
Date of birth
Your 27th Mersenne Prime Exponent Day is on
Friday
when you will be
44,497 days old

These are primes p such that 2p - 1 is prime.

For Mersenne Prime Days see Mersenne Prime Days.

Remind me, please


Next Prime Events
Day Age
Event
Days Ahead
Year Age
05 May 2026
25,391
15
69
05 May 2026
25,391
15
69
04 Nov 2027
25,939
563
71
18 Aug 2028
26,227
851
71
15 Nov 2029
26,681
1,305
73
14 Apr 2035
28,657
3,281
78
30 Mar 2039
30,103
4,727
82
02 Sep 2058
37,199
11,823
101
09 Aug 2064
39,367
13,991
107
11 Jul 2076
43,721
18,345
119
26 Aug 2078
44,497
19,121
121
08 Dec 2089
48,619
23,243
133
04 Apr 2136
65,537
40,161
179
19 May 2231
100,279
74,903
274
06 Dec 2254
108,881
83,505
298
08 Sep 2315
131,071
105,695
358
30 Dec 7773
2,124,679
2,099,303
5817
Ordinal
Day Age
Date
Age
1st
2
30 Oct 1956
0
2nd
3
31 Oct 1956
0
3rd
5
02 Nov 1956
0
4th
7
04 Nov 1956
0
5th
13
10 Nov 1956
0
6th
17
14 Nov 1956
0
7th
19
16 Nov 1956
0
8th
31
28 Nov 1956
0
9th
61
28 Dec 1956
0
10th
89
25 Jan 1957
0
11th
107
12 Feb 1957
0
12th
127
04 Mar 1957
0
13th
521
02 Apr 1958
1
14th
607
27 Jun 1958
1
15th
1,279
29 Apr 1960
3
16th
2,203
09 Nov 1962
6
17th
2,281
26 Jan 1963
6
18th
3,217
19 Aug 1965
8
19th
4,253
20 Jun 1968
11
20th
4,423
07 Dec 1968
12
21st
9,689
09 May 1983
26
22nd
9,941
16 Jan 1984
27
23rd
11,213
11 Jul 1987
30
24th
19,937
30 May 2011
54
25th
21,701
28 Mar 2016
59
26th
23,209
14 May 2020
63
27th
44,497
26 Aug 2078
121
1
28th
86,243
12 Dec 2192
236