A069687 - cp's OEIS frontend

A069687 Primes that yield another prime on placing a 1 on both sides (as leading and trailing digits).

n	a(n)
1	3
2	5
3	17
4	23
5	29
6	47
7	53
8	83
9	107
10	113
11	131
12	149
13	173
14	197
15	239
16	251
17	317
18	359
19	383
20	401
21	443
22	503
23	509
24	599
25	641
26	683
27	701
28	719
29	743
30	797
31	821
32	947
33	953
34	1031
35	1049
36	1103
37	1109
38	1187
39	1229
40	1277
41	1283
42	1301
43	1373
44	1583
45	1613
46	1619
47	1637
48	1733
49	1847
50	1889

[3, 5, 17, 23, 29, 47, 53, 83, 107, 113, 131, 149, 173, 197, 239, 251, 317, 359, 383, 401, 443, 503, 509, 599, 641, 683, 701, 719, 743, 797, 821, 947, 953, 1031, 1049, 1103, 1109, 1187, 1229, 1277, 1283, 1301, 1373, 1583, 1613, 1619, 1637, 1733, 1847, 1889]

cp's OEIS Frontend

A069687 Primes that yield another prime on placing a 1 on both sides (as leading and trailing digits).

Table of values

List of values