A339020 - cp's OEIS frontend

A339020 Largest value of (p*q mod n), for primes p and q, where p + q = n and p <= q (or 0 if no such primes exist).

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

[0, 0, 0, 0, 1, 3, 3, 7, 5, 5, 0, 11, 9, 7, 11, 7, 0, 11, 15, 11, 17, 19, 0, 23, 21, 17, 0, 19, 0, 29, 27, 23, 29, 25, 0, 35, 0, 27, 35, 39, 0, 41, 39, 39, 41, 37, 0, 47, 45, 41, 0, 43, 0, 47, 51, 55, 0, 53, 0, 59, 57, 53, 59, 55, 0, 65, 0, 59, 65, 69, 0, 71, 69, 65, 71, 71, 0, 53]

cp's OEIS Frontend

A339020 Largest value of (p*q mod n), for primes p and q, where p + q = n and p <= q (or 0 if no such primes exist).

Table of values

List of values

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

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

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