A243411 - cp's OEIS frontend

A243411 Least prime p such that p10^n-1, p10^n-3, p10^n-7 and p10^n-9 are all prime.

n	a(n)
1	2
2	2
3	10193
4	24851
5	20549
6	719
7	22133
8	230471
9	46679
10	432449
11	114689
12	227603
13	305297
14	61463
15	1866467
16	866309
17	1189403
18	362081
19	2615783
20	493433
21	966353
22	4154363
23	6562931
24	9096203
25	3701627
26	3128813
27	20983727
28	303593
29	24437537
30	1068491

[2, 2, 10193, 24851, 20549, 719, 22133, 230471, 46679, 432449, 114689, 227603, 305297, 61463, 1866467, 866309, 1189403, 362081, 2615783, 493433, 966353, 4154363, 6562931, 9096203, 3701627, 3128813, 20983727, 303593, 24437537, 1068491]

cp's OEIS Frontend

A243411 Least prime p such that p10^n-1, p10^n-3, p10^n-7 and p10^n-9 are all prime.

Table of values

List of values

cp's OEIS Frontend

A243411 Least prime p such that p*10^n-1, p*10^n-3, p*10^n-7 and p*10^n-9 are all prime.

Table of values

List of values

A243411 Least prime p such that p10^n-1, p10^n-3, p10^n-7 and p10^n-9 are all prime.