Every Day Counts
Carol Prime Days
 
Age: 16,172 days
Date of birth

These are primes which are also Carol numbers.

Carol numbers are of the form (2n - 1)2 - 2

Carol numbers were first studied by Cletus Emmanuel, who named them after a friend, Carol G. Kirnon.

The sixth Carol prime is 1,046,527 so it's unlikely you'll ever have more than 5 Carol Prime Days. After that they go very big.

Remind me, please


Next Prime Events
Day Age
Event
Days Ahead
Year Age
24 Mar 2026
16,183
11
44
18 Sep 2026
16,361
189
44
08 Oct 2026
16,381
209
44
08 Oct 2026
16,381
209
44
08 Oct 2026
16,381
209
44
05 Jul 2027
16,651
479
45
13 Jan 2028
16,843
671
46
28 Oct 2029
17,497
1,325
47
12 Sep 2031
18,181
2,009
49
04 Jan 2035
19,391
3,219
53
03 Jul 2036
19,937
3,765
54
18 May 2060
28,657
12,485
78
16 Aug 2101
43,721
27,549
119
13 Jan 2115
48,619
32,447
133
09 May 2161
65,537
49,365
179
22 Jun 2256
100,279
84,107
274
12 Oct 2340
131,071
114,899
358
Ordinal
Day Age
Date
Age
1st
7
09 Dec 1981
0
2nd
47
18 Jan 1982
0
3rd
223
13 Jul 1982
0
4th
3,967
12 Oct 1992
10
5th
16,127
27 Jan 2026
44