Every Day Counts
Centred Triangular Prime Days
 
Age: 27,543 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
28 May 2024
27,551
8
75
01 Jan 2027
28,499
956
78
08 Jun 2027
28,657
1,114
78
23 Nov 2028
29,191
1,648
79
24 May 2031
30,103
2,560
82
24 May 2040
33,391
5,848
91
27 Oct 2050
37,199
9,656
101
03 Oct 2056
39,367
11,824
107
04 Sep 2068
43,721
16,178
119
20 Oct 2070
44,497
16,954
121
01 Feb 2082
48,619
21,076
133
29 May 2128
65,537
37,994
179
13 Jul 2223
100,279
72,736
274
30 Jan 2247
108,881
81,338
298
02 Nov 2307
131,071
103,528
358
23 Feb 7766
2,124,679
2,097,136
5817
Ordinal
Day Age
Date
Age
1st
19
10 Jan 1949
0
2nd
31
22 Jan 1949
0
3rd
109
10 Apr 1949
0
4th
199
09 Jul 1949
0
5th
409
04 Feb 1950
1
6th
571
16 Jul 1950
1
7th
631
14 Sep 1950
1
8th
829
31 Mar 1951
2
9th
1,489
19 Jan 1953
4
10th
1,999
13 Jun 1954
5
11th
2,341
21 May 1955
6
12th
2,971
09 Feb 1957
8
13th
3,529
21 Aug 1958
9
14th
4,621
17 Aug 1961
12
15th
4,789
01 Feb 1962
13
16th
7,039
31 Mar 1968
19
17th
7,669
21 Dec 1969
20
18th
8,779
04 Jan 1973
24
19th
9,721
04 Aug 1975
26
20th
10,459
11 Aug 1977
28
21st
10,711
20 Apr 1978
29
22nd
13,681
07 Jun 1986
37
23rd
14,851
20 Aug 1989
40
24th
16,069
20 Dec 1992
43
25th
16,381
28 Oct 1993
44
26th
17,659
28 Apr 1997
48
27th
20,011
06 Oct 2003
54
28th
20,359
18 Sep 2004
55
29th
23,251
19 Aug 2012
63
30th
25,939
29 Dec 2019
71
31st
27,541
18 May 2024
75
32nd
29,191
23 Nov 2028
79
1
33rd
29,611
17 Jan 2030
81
34th
31,321
23 Sep 2034
85
35th
34,429
28 Mar 2043
94
36th
36,739
24 Jul 2049
100
37th
40,099
05 Oct 2058
109
38th
40,591
09 Feb 2060
111
39th
42,589
30 Jul 2065
116