Every Day Counts
Centred Triangular Prime Days
 
Age: 27,542 days
Date of birth
Your 32nd Centred Triangular Prime Day is on
Thursday
when you will be
29,191 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
31 Dec 2024
27,551
9
75
06 Aug 2027
28,499
957
78
11 Jan 2028
28,657
1,115
78
28 Jun 2029
29,191
1,649
79
27 Dec 2031
30,103
2,561
82
27 Dec 2040
33,391
5,849
91
01 Jun 2051
37,199
9,657
101
08 May 2057
39,367
11,825
107
09 Apr 2069
43,721
16,179
119
25 May 2071
44,497
16,955
121
06 Sep 2082
48,619
21,077
133
01 Jan 2129
65,537
37,995
179
15 Feb 2224
100,279
72,737
274
04 Sep 2247
108,881
81,339
298
06 Jun 2308
131,071
103,529
358
28 Sep 7766
2,124,679
2,097,137
5817
Ordinal
Day Age
Date
Age
1st
19
15 Aug 1949
0
2nd
31
27 Aug 1949
0
3rd
109
13 Nov 1949
0
4th
199
11 Feb 1950
0
5th
409
09 Sep 1950
1
6th
571
18 Feb 1951
1
7th
631
19 Apr 1951
1
8th
829
03 Nov 1951
2
9th
1,489
24 Aug 1953
4
10th
1,999
16 Jan 1955
5
11th
2,341
24 Dec 1955
6
12th
2,971
14 Sep 1957
8
13th
3,529
26 Mar 1959
9
14th
4,621
22 Mar 1962
12
15th
4,789
06 Sep 1962
13
16th
7,039
03 Nov 1968
19
17th
7,669
26 Jul 1970
20
18th
8,779
09 Aug 1973
24
19th
9,721
08 Mar 1976
26
20th
10,459
16 Mar 1978
28
21st
10,711
23 Nov 1978
29
22nd
13,681
10 Jan 1987
37
23rd
14,851
25 Mar 1990
40
24th
16,069
25 Jul 1993
43
25th
16,381
02 Jun 1994
44
26th
17,659
01 Dec 1997
48
27th
20,011
10 May 2004
54
28th
20,359
23 Apr 2005
55
29th
23,251
24 Mar 2013
63
30th
25,939
02 Aug 2020
71
31st
27,541
21 Dec 2024
75
32nd
29,191
28 Jun 2029
79
1
33rd
29,611
22 Aug 2030
81
34th
31,321
28 Apr 2035
85
35th
34,429
31 Oct 2043
94
36th
36,739
26 Feb 2050
100
37th
40,099
10 May 2059
109
38th
40,591
13 Sep 2060
111
39th
42,589
04 Mar 2066
116