Every Day Counts
Centred Triangular Prime Days
 
Age: 27,546 days
Date of birth
Your 32nd Centred Triangular Prime Day is on
Wednesday
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
01 Jul 2024
27,551
5
75
04 Feb 2027
28,499
953
78
12 Jul 2027
28,657
1,111
78
27 Dec 2028
29,191
1,645
79
27 Jun 2031
30,103
2,557
82
27 Jun 2040
33,391
5,845
91
30 Nov 2050
37,199
9,653
101
06 Nov 2056
39,367
11,821
107
08 Oct 2068
43,721
16,175
119
23 Nov 2070
44,497
16,951
121
07 Mar 2082
48,619
21,073
133
02 Jul 2128
65,537
37,991
179
16 Aug 2223
100,279
72,733
274
05 Mar 2247
108,881
81,335
298
06 Dec 2307
131,071
103,525
358
29 Mar 7766
2,124,679
2,097,133
5817
Ordinal
Day Age
Date
Age
1st
19
13 Feb 1949
0
2nd
31
25 Feb 1949
0
3rd
109
14 May 1949
0
4th
199
12 Aug 1949
0
5th
409
10 Mar 1950
1
6th
571
19 Aug 1950
1
7th
631
18 Oct 1950
1
8th
829
04 May 1951
2
9th
1,489
22 Feb 1953
4
10th
1,999
17 Jul 1954
5
11th
2,341
24 Jun 1955
6
12th
2,971
15 Mar 1957
8
13th
3,529
24 Sep 1958
9
14th
4,621
20 Sep 1961
12
15th
4,789
07 Mar 1962
13
16th
7,039
04 May 1968
19
17th
7,669
24 Jan 1970
20
18th
8,779
07 Feb 1973
24
19th
9,721
07 Sep 1975
26
20th
10,459
14 Sep 1977
28
21st
10,711
24 May 1978
29
22nd
13,681
11 Jul 1986
37
23rd
14,851
23 Sep 1989
40
24th
16,069
23 Jan 1993
43
25th
16,381
01 Dec 1993
44
26th
17,659
01 Jun 1997
48
27th
20,011
09 Nov 2003
54
28th
20,359
22 Oct 2004
55
29th
23,251
22 Sep 2012
63
30th
25,939
01 Feb 2020
71
31st
27,541
21 Jun 2024
75
32nd
29,191
27 Dec 2028
79
1
33rd
29,611
20 Feb 2030
81
34th
31,321
27 Oct 2034
85
35th
34,429
01 May 2043
94
36th
36,739
27 Aug 2049
100
37th
40,099
08 Nov 2058
109
38th
40,591
14 Mar 2060
111
39th
42,589
02 Sep 2065
116