Every Day Counts
Centred Triangular Prime Days
 
Age: 14,920 days
Date of birth
Your 24th Centred Triangular Prime Day is on
Sunday
when you will be
16,069 days old

A centred triangular prime is a centred triangular number that is prime.

Centred triangular numbers are of the form (3n2 + 3n + 2) / 2

A centred triangular number is a centred figurate number that represents a triangle with a dot in the centre and all other dots surrounding the centre in successive triangular layers.

The figures for the first four centred triangular numbers are shown below:

Remind me, please


Next Prime Events
Day Age
Event
Days Ahead
Year Age
24 Dec 2024
14,923
3
40
18 Jan 2026
15,313
393
41
16 Apr 2026
15,401
481
42
05 Jun 2026
15,451
531
42
13 Feb 2028
16,069
1,149
43
11 Apr 2028
16,127
1,207
44
17 Sep 2029
16,651
1,731
45
28 Mar 2030
16,843
1,923
46
11 Jan 2032
17,497
2,577
47
25 Nov 2033
18,181
3,261
49
19 Mar 2037
19,391
4,471
53
16 Sep 2038
19,937
5,017
54
01 Aug 2062
28,657
13,737
78
30 Oct 2103
43,721
28,801
119
28 Mar 2117
48,619
33,699
133
23 Jul 2163
65,537
50,617
179
05 Sep 2258
100,279
85,359
274
26 Dec 2342
131,071
116,151
358
Ordinal
Day Age
Date
Age
1st
19
05 Mar 1984
0
2nd
31
17 Mar 1984
0
3rd
109
03 Jun 1984
0
4th
199
01 Sep 1984
0
5th
409
30 Mar 1985
1
6th
571
08 Sep 1985
1
7th
631
07 Nov 1985
1
8th
829
24 May 1986
2
9th
1,489
14 Mar 1988
4
10th
1,999
06 Aug 1989
5
11th
2,341
14 Jul 1990
6
12th
2,971
04 Apr 1992
8
13th
3,529
14 Oct 1993
9
14th
4,621
10 Oct 1996
12
15th
4,789
27 Mar 1997
13
16th
7,039
25 May 2003
19
17th
7,669
13 Feb 2005
20
18th
8,779
28 Feb 2008
24
19th
9,721
27 Sep 2010
26
20th
10,459
04 Oct 2012
28
21st
10,711
13 Jun 2013
29
22nd
13,681
31 Jul 2021
37
23rd
14,851
13 Oct 2024
40
24th
16,069
13 Feb 2028
43
1
25th
16,381
21 Dec 2028
44
26th
17,659
21 Jun 2032
48
27th
20,011
29 Nov 2038
54
28th
20,359
12 Nov 2039
55
29th
23,251
13 Oct 2047
63
30th
25,939
21 Feb 2055
71
31st
27,541
12 Jul 2059
75
32nd
29,191
17 Jan 2064
79
33rd
29,611
12 Mar 2065
81
34th
31,321
16 Nov 2069
85
35th
34,429
21 May 2078
94
36th
36,739
16 Sep 2084
100
37th
40,099
28 Nov 2093
109
38th
40,591
04 Apr 2095
111
39th
42,589
23 Sep 2100
116