Every Day Counts
Centred Triangular Prime Days
 
Age: 14,833 days
Date of birth
Your 23rd Centred Triangular Prime Day is on
Wednesday
when you will be
14,851 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
06 May 2025
14,843
10
40
14 May 2025
14,851
18
40
19 Aug 2026
15,313
480
41
15 Nov 2026
15,401
568
42
04 Jan 2027
15,451
618
42
10 Nov 2028
16,127
1,294
44
18 Apr 2030
16,651
1,818
45
27 Oct 2030
16,843
2,010
46
11 Aug 2032
17,497
2,664
47
26 Jun 2034
18,181
3,348
49
18 Oct 2037
19,391
4,558
53
17 Apr 2039
19,937
5,104
54
02 Mar 2063
28,657
13,824
78
30 May 2104
43,721
28,888
119
27 Oct 2117
48,619
33,786
133
21 Feb 2164
65,537
50,704
179
06 Apr 2259
100,279
85,446
274
27 Jul 2343
131,071
116,238
358
Ordinal
Day Age
Date
Age
1st
19
04 Oct 1984
0
2nd
31
16 Oct 1984
0
3rd
109
02 Jan 1985
0
4th
199
02 Apr 1985
0
5th
409
29 Oct 1985
1
6th
571
09 Apr 1986
1
7th
631
08 Jun 1986
1
8th
829
23 Dec 1986
2
9th
1,489
13 Oct 1988
4
10th
1,999
07 Mar 1990
5
11th
2,341
12 Feb 1991
6
12th
2,971
03 Nov 1992
8
13th
3,529
15 May 1994
9
14th
4,621
11 May 1997
12
15th
4,789
26 Oct 1997
13
16th
7,039
24 Dec 2003
19
17th
7,669
14 Sep 2005
20
18th
8,779
28 Sep 2008
24
19th
9,721
28 Apr 2011
26
20th
10,459
05 May 2013
28
21st
10,711
12 Jan 2014
29
22nd
13,681
01 Mar 2022
37
23rd
14,851
14 May 2025
40
1
24th
16,069
13 Sep 2028
43
25th
16,381
22 Jul 2029
44
26th
17,659
20 Jan 2033
48
27th
20,011
30 Jun 2039
54
28th
20,359
12 Jun 2040
55
29th
23,251
13 May 2048
63
30th
25,939
22 Sep 2055
71
31st
27,541
10 Feb 2060
75
32nd
29,191
17 Aug 2064
79
33rd
29,611
11 Oct 2065
81
34th
31,321
17 Jun 2070
85
35th
34,429
20 Dec 2078
94
36th
36,739
17 Apr 2085
100
37th
40,099
29 Jun 2094
109
38th
40,591
03 Nov 2095
111
39th
42,589
24 Apr 2101
116