Every Day Counts
Centred Triangular Prime Days
 
Age: 16,062 days
Date of birth
Your 24th Centred Triangular Prime Day is on
Friday
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
13 Jun 2026
16,063
tomorrow
43
19 Jun 2026
16,069
7
43
16 Aug 2026
16,127
65
44
07 Apr 2027
16,361
299
44
27 Apr 2027
16,381
319
44
27 Apr 2027
16,381
319
44
22 Jan 2028
16,651
589
45
01 Aug 2028
16,843
781
46
17 May 2030
17,497
1,435
47
31 Mar 2032
18,181
2,119
49
24 Jul 2035
19,391
3,329
53
20 Jan 2037
19,937
3,875
54
05 Dec 2060
28,657
12,595
78
05 Mar 2102
43,721
27,659
119
02 Aug 2115
48,619
32,557
133
26 Nov 2161
65,537
49,475
179
09 Jan 2257
100,279
84,217
274
01 May 2341
131,071
115,009
358
Ordinal
Day Age
Date
Age
1st
19
10 Jul 1982
0
2nd
31
22 Jul 1982
0
3rd
109
08 Oct 1982
0
4th
199
06 Jan 1983
0
5th
409
04 Aug 1983
1
6th
571
13 Jan 1984
1
7th
631
13 Mar 1984
1
8th
829
27 Sep 1984
2
9th
1,489
19 Jul 1986
4
10th
1,999
11 Dec 1987
5
11th
2,341
17 Nov 1988
6
12th
2,971
09 Aug 1990
8
13th
3,529
18 Feb 1992
9
14th
4,621
14 Feb 1995
12
15th
4,789
01 Aug 1995
13
16th
7,039
28 Sep 2001
19
17th
7,669
20 Jun 2003
20
18th
8,779
04 Jul 2006
24
19th
9,721
31 Jan 2009
26
20th
10,459
08 Feb 2011
28
21st
10,711
18 Oct 2011
29
22nd
13,681
05 Dec 2019
37
23rd
14,851
17 Feb 2023
40
24th
16,069
19 Jun 2026
43
1
25th
16,381
27 Apr 2027
44
26th
17,659
26 Oct 2030
48
27th
20,011
04 Apr 2037
54
28th
20,359
18 Mar 2038
55
29th
23,251
16 Feb 2046
63
30th
25,939
27 Jun 2053
71
31st
27,541
15 Nov 2057
75
32nd
29,191
23 May 2062
79
33rd
29,611
17 Jul 2063
81
34th
31,321
22 Mar 2068
85
35th
34,429
24 Sep 2076
94
36th
36,739
21 Jan 2083
100
37th
40,099
03 Apr 2092
109
38th
40,591
08 Aug 2093
111
39th
42,589
27 Jan 2099
116