A254754 - cp's OEIS frontend

A254754 Prime numbers such that, in base 10, all their proper prefixes and suffixes represent composites.

n	a(n)
1	89
2	409
3	449
4	499
5	809
6	4049
7	4549
8	4649
9	4909
10	4969
11	6299
12	6469
13	6869
14	6899
15	6949
16	8009
17	8039
18	8069
19	8209
20	8609
21	8669
22	8699
23	8849
24	9049
25	9209
26	9649
27	9949
28	40009
29	40099
30	40609
31	40639
32	40699
33	40849
34	42209
35	42649
36	44249
37	44699
38	45949
39	46049
40	46099

[89, 409, 449, 499, 809, 4049, 4549, 4649, 4909, 4969, 6299, 6469, 6869, 6899, 6949, 8009, 8039, 8069, 8209, 8609, 8669, 8699, 8849, 9049, 9209, 9649, 9949, 40009, 40099, 40609, 40639, 40699, 40849, 42209, 42649, 44249, 44699, 45949, 46049, 46099]

cp's OEIS Frontend

A254754 Prime numbers such that, in base 10, all their proper prefixes and suffixes represent composites.

Table of values

List of values