Prime p₀= 2256149109696834263 starts a Symmetric tuple of 18 consecutive primes (SPT).
d_n: 0 18 18 84 14 82 8 42 34 44 34 42 8 82 14 84 18 18 (?)
a_n: 0 18 36 120 134 216 224 266 300 344 378 420 428 510 524 608 626 644
All 18 integers p_n = p₀+a_n = p_n-1+d_n are prime and there are no other primes in the gaps.
diameter: 644
Found by: Orange Kid
db: batch=81, k=18, 18 18 84 14 82 8 42 34 44

SPT(16)	2256147761465337941	0 6 32 42 60 62 78 90 218 230 246 248 266 276 302 308	-1348231496322
STPT(10)	2256147899110028447	0 2 30 32 42 44 54 56 84 86	-1210586805816
SPT(16)	2256148067286108319	0 42 70 148 168 178 234 258 304 328 384 394 414 492 520 562	-1042410725944
SPT(16)	2256148535816871233	0 6 14 66 74 90 114 140 174 200 224 240 248 300 308 314	-573879963030
SPT(16)	2256148603452794833	0 18 24 96 144 178 228 256 258 286 336 370 418 490 496 514	-506244039430
SPT(16)	2256148870210154177	0 26 60 74 84 104 140 150 266 276 312 332 342 356 390 416	-239486680086
SPT(16)	2256149798032992973	0 46 60 96 130 138 144 174 220 250 256 264 298 334 348 394	688336158710
STPT(10)	2256149957002135937	0 2 12 14 42 44 72 74 84 86	847305301674
STPT(10)	2256150087361908839	0 2 12 14 90 92 168 170 180 182	977665074576
SPT(16)	2256150794867123443	0 90 106 144 154 156 198 238 246 286 328 330 340 378 394 484	1685170289180
SPT(16)	2256150907140505993	0 18 30 34 36 60 88 150 154 216 244 268 270 274 286 304	1797443671730