A068998 - cp's OEIS frontend

A068998 Numbers m such that the concatenation of the prime factors of m (in increasing order and ignoring multiplicity) is prime.

n	a(n)
1	2
2	3
3	4
4	5
5	6
6	7
7	8
8	9
9	11
10	12
11	13
12	16
13	17
14	18
15	19
16	21
17	22
18	23
19	24
20	25
21	27
22	29
23	31
24	32
25	33
26	36
27	37
28	39
29	41
30	43
31	44
32	46
33	47
34	48
35	49
36	51
37	53
38	54
39	58
40	59
41	61
42	63
43	64
44	66
45	67
46	70
47	71
48	72
49	73
50	79
51	81
52	82
53	83
54	88
55	89
56	92
57	93
58	96
59	97
60	99
61	101
62	103
63	107
64	108
65	109
66	111

[2, 3, 4, 5, 6, 7, 8, 9, 11, 12, 13, 16, 17, 18, 19, 21, 22, 23, 24, 25, 27, 29, 31, 32, 33, 36, 37, 39, 41, 43, 44, 46, 47, 48, 49, 51, 53, 54, 58, 59, 61, 63, 64, 66, 67, 70, 71, 72, 73, 79, 81, 82, 83, 88, 89, 92, 93, 96, 97, 99, 101, 103, 107, 108, 109, 111]

cp's OEIS Frontend

A068998 Numbers m such that the concatenation of the prime factors of m (in increasing order and ignoring multiplicity) is prime.

Table of values

List of values

n	a(n)
1	2
2	3
3	4
4	5
5	6
6	7
7	8
8	9
9	11
10	12
11	13
12	16
13	17
14	18
15	19
16	21
17	22
18	23
19	24
20	25
21	27
22	29
23	31
24	32
25	33
26	36
27	37
28	39
29	41
30	43
31	44
32	46
33	47
34	48
35	49
36	51
37	53
38	54
39	58
40	59
41	61
42	63
43	64
44	66
45	67
46	70
47	71
48	72
49	73
50	79
51	81
52	82
53	83
54	88
55	89
56	92
57	93
58	96
59	97
60	99
61	101
62	103
63	107
64	108
65	109
66	111

n	a(n)
1	2
2	3
3	4
4	5
5	6
6	7
7	8
8	9
9	11
10	12
11	13
12	16
13	17
14	18
15	19
16	21
17	22
18	23
19	24
20	25
21	27
22	29
23	31
24	32
25	33
26	36
27	37
28	39
29	41
30	43
31	44
32	46
33	47
34	48
35	49
36	51
37	53
38	54
39	58
40	59
41	61
42	63
43	64
44	66
45	67
46	70
47	71
48	72
49	73
50	79
51	81
52	82
53	83
54	88
55	89
56	92
57	93
58	96
59	97
60	99
61	101
62	103
63	107
64	108
65	109
66	111

n	a(n)
1	2
2	3
3	4
4	5
5	6
6	7
7	8
8	9
9	11
10	12
11	13
12	16
13	17
14	18
15	19
16	21
17	22
18	23
19	24
20	25
21	27
22	29
23	31
24	32
25	33
26	36
27	37
28	39
29	41
30	43
31	44
32	46
33	47
34	48
35	49
36	51
37	53
38	54
39	58
40	59
41	61
42	63
43	64
44	66
45	67
46	70
47	71
48	72
49	73
50	79
51	81
52	82
53	83
54	88
55	89
56	92
57	93
58	96
59	97
60	99
61	101
62	103
63	107
64	108
65	109
66	111