A375548 - cp's OEIS frontend

A375548 a(n) is the least prime number of the form n mod (10^k) for some k > 0, or 0 if no such prime number exists.

n	a(n)
0	0
1	0
2	2
3	3
4	0
5	5
6	0
7	7
8	0
9	0
10	0
11	11
12	2
13	3
14	0
15	5
16	0
17	7
18	0
19	19
20	0
21	0
22	2
23	3
24	0
25	5
26	0
27	7
28	0
29	29
30	0
31	31
32	2
33	3
34	0
35	5
36	0
37	7
38	0
39	0
40	0
41	41
42	2
43	3
44	0
45	5
46	0
47	7
48	0
49	0
50	0
51	0
52	2
53	3
54	0
55	5
56	0
57	7
58	0
59	59
60	0
61	61
62	2
63	3
64	0
65	5
66	0
67	7
68	0
69	0
70	0
71	71
72	2
73	3
74	0
75	5
76	0
77	7
78	0
79	79
80	0

[0, 0, 2, 3, 0, 5, 0, 7, 0, 0, 0, 11, 2, 3, 0, 5, 0, 7, 0, 19, 0, 0, 2, 3, 0, 5, 0, 7, 0, 29, 0, 31, 2, 3, 0, 5, 0, 7, 0, 0, 0, 41, 2, 3, 0, 5, 0, 7, 0, 0, 0, 0, 2, 3, 0, 5, 0, 7, 0, 59, 0, 61, 2, 3, 0, 5, 0, 7, 0, 0, 0, 71, 2, 3, 0, 5, 0, 7, 0, 79, 0]

cp's OEIS Frontend

A375548 a(n) is the least prime number of the form n mod (10^k) for some k > 0, or 0 if no such prime number exists.

Table of values

List of values

n	a(n)
0	0
1	0
2	2
3	3
4	0
5	5
6	0
7	7
8	0
9	0
10	0
11	11
12	2
13	3
14	0
15	5
16	0
17	7
18	0
19	19
20	0
21	0
22	2
23	3
24	0
25	5
26	0
27	7
28	0
29	29
30	0
31	31
32	2
33	3
34	0
35	5
36	0
37	7
38	0
39	0
40	0
41	41
42	2
43	3
44	0
45	5
46	0
47	7
48	0
49	0
50	0
51	0
52	2
53	3
54	0
55	5
56	0
57	7
58	0
59	59
60	0
61	61
62	2
63	3
64	0
65	5
66	0
67	7
68	0
69	0
70	0
71	71
72	2
73	3
74	0
75	5
76	0
77	7
78	0
79	79
80	0

n	a(n)
0	0
1	0
2	2
3	3
4	0
5	5
6	0
7	7
8	0
9	0
10	0
11	11
12	2
13	3
14	0
15	5
16	0
17	7
18	0
19	19
20	0
21	0
22	2
23	3
24	0
25	5
26	0
27	7
28	0
29	29
30	0
31	31
32	2
33	3
34	0
35	5
36	0
37	7
38	0
39	0
40	0
41	41
42	2
43	3
44	0
45	5
46	0
47	7
48	0
49	0
50	0
51	0
52	2
53	3
54	0
55	5
56	0
57	7
58	0
59	59
60	0
61	61
62	2
63	3
64	0
65	5
66	0
67	7
68	0
69	0
70	0
71	71
72	2
73	3
74	0
75	5
76	0
77	7
78	0
79	79
80	0

n	a(n)
0	0
1	0
2	2
3	3
4	0
5	5
6	0
7	7
8	0
9	0
10	0
11	11
12	2
13	3
14	0
15	5
16	0
17	7
18	0
19	19
20	0
21	0
22	2
23	3
24	0
25	5
26	0
27	7
28	0
29	29
30	0
31	31
32	2
33	3
34	0
35	5
36	0
37	7
38	0
39	0
40	0
41	41
42	2
43	3
44	0
45	5
46	0
47	7
48	0
49	0
50	0
51	0
52	2
53	3
54	0
55	5
56	0
57	7
58	0
59	59
60	0
61	61
62	2
63	3
64	0
65	5
66	0
67	7
68	0
69	0
70	0
71	71
72	2
73	3
74	0
75	5
76	0
77	7
78	0
79	79
80	0