Prime p₀= 2256430227403038931 starts a Symmetric tuple of 13 consecutive primes (SPT).
d_n: 0 12 18 60 36 6 24 24 6 36 60 18 12 (?)
a_n: 0 12 30 90 126 132 156 180 186 222 282 300 312
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: 312
Found by: JayPi
db: batch=81, k=13, 12 18 60 36 6 24

SPT(16)	2256428917796405903	0 6 18 24 26 56 116 134 150 168 228 258 260 266 278 284	-1309606633028
SPT(16)	2256428969944292713	0 48 58 70 190 198 226 240 286 300 328 336 456 468 478 526	-1257458746218
STPT(10)	2256429257313250907	0 2 30 32 42 44 54 56 84 86	-970089788024
SPT(16)	2256429404942367983	0 26 60 66 80 104 116 126 128 138 150 174 188 194 228 254	-822460670948
SPT(16)	2256429463614474469	0 52 90 100 132 168 192 198 214 220 244 280 312 322 360 412	-763788564462
STPT(10)	2256429609955701239	0 2 42 44 90 92 138 140 180 182	-617447337692
SPT(16)	2256430230232181389	0 22 64 100 102 112 154 210 214 270 312 322 324 360 402 424	2829142458
SPT(16)	2256430282623568277	0 6 24 30 50 66 72 92 204 224 230 246 266 272 290 296	55220529346
TPT(14)	2256430373614843079	0 2 108 110 162 164 192 194 210 212 300 302 390 392	146211804148
SPT(16)	2256430731141372109	0 18 42 58 70 108 174 178 234 238 304 342 354 370 394 412	503738333178
SPT(16)	2256430883186224949	0 42 44 78 84 168 218 228 344 354 404 488 494 528 530 572	655783186018