A121608 - cp's OEIS frontend

A121608 Primes that can be written as concatenation of two composite numbers in decimal representation.

n	a(n)
1	89
2	109
3	149
4	229
5	269
6	349
7	359
8	389
9	409
10	421
11	433
12	439
13	449
14	457
15	463
16	487
17	491
18	499
19	509
20	569
21	659
22	677
23	691
24	709
25	769
26	809
27	821
28	827
29	829
30	839
31	857
32	859
33	863
34	877
35	881
36	887
37	919
38	929
39	977
40	991
41	1009
42	1021
43	1033
44	1039
45	1049
46	1051
47	1063
48	1069
49	1087
50	1091

[89, 109, 149, 229, 269, 349, 359, 389, 409, 421, 433, 439, 449, 457, 463, 487, 491, 499, 509, 569, 659, 677, 691, 709, 769, 809, 821, 827, 829, 839, 857, 859, 863, 877, 881, 887, 919, 929, 977, 991, 1009, 1021, 1033, 1039, 1049, 1051, 1063, 1069, 1087, 1091]

cp's OEIS Frontend

A121608 Primes that can be written as concatenation of two composite numbers in decimal representation.

Table of values

List of values