Prime p₀= 1238815905566253143 starts a Symmetric tuple of 13 consecutive primes (SPT).
d_n: 0 30 24 30 6 18 66 66 18 6 30 24 30 (?)
a_n: 0 30 54 84 90 108 174 240 258 264 294 318 348
All 13 integers p_n = p₀+a_n = p_n-1+d_n are prime and there are no other primes in the gaps.
diameter: 348
Found by: mikey
db: batch=77, k=13, 30 24 30 6 18 66

SPT(16)	1238814113144552741	0 60 96 140 150 156 180 192 200 212 236 242 252 296 332 392	-1792421700402
SPT(16)	1238814280784671049	0 8 42 50 78 128 134 182 210 258 264 314 342 350 384 392	-1624781582094
SPT(16)	1238815110885107089	0 10 24 78 118 124 132 180 232 280 288 294 334 388 402 412	-794681146054
STPT(10)	1238815111232128481	0 2 6 8 18 20 30 32 36 38	-794334124662
STPT(10)	1238815113379328669	0 2 18 20 30 32 42 44 60 62	-792186924474
STPT(10)	1238815847592252899	0 2 12 14 30 32 48 50 60 62	-57974000244
STPT(10)	1238816160264105089	0 2 42 44 60 62 78 80 120 122	254697851946
SPT(16)	1238816201105518291	0 40 60 102 112 126 132 156 172 196 202 216 226 268 288 328	295539265148
STPT(10)	1238816218459187507	0 2 12 14 42 44 72 74 84 86	312892934364
SPT(16)	1238816228996788291	0 12 16 72 78 82 90 106 132 148 156 160 166 222 226 238	323430535148
STPT(12)	1238816278027154507	0 2 30 32 42 44 90 92 102 104 132 134	372460901364