Prime p₀= 2217621395726541289 starts a Symmetric tuple of 18 consecutive primes (SPT).
d_n: 0 34 26 18 10 2 4 8 16 26 16 8 4 2 10 18 26 34 (?)
a_n: 0 34 60 78 88 90 94 102 118 144 160 168 172 174 184 202 228 262
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: 262
Found by: Penguin
db: batch=81, k=18, 34 26 18 10 2 4 8 16 26

STPT(10)	2217619934283413741	0 2 6 8 48 50 90 92 96 98	-1461443127548
STPT(10)	2217620004448473797	0 2 42 44 72 74 102 104 144 146	-1391278067492
SPT(16)	2217620361311224579	0 24 58 100 120 178 208 234 238 264 294 352 372 414 448 472	-1034415316710
SPT(16)	2217620558069303047	0 24 36 66 82 100 136 156 160 180 216 234 250 280 292 316	-837657238242
SPT(16)	2217620827358309929	0 48 54 70 72 78 108 114 118 124 154 160 162 178 184 232	-568368231360
STPT(10)	2217621247915371029	0 2 42 44 90 92 138 140 180 182	-147811170260
SPT(16)	2217621961724842033	0 18 100 106 138 186 238 280 324 366 418 466 498 504 586 604	565998300744
SPT(13)	2217622620091824563	0 30 90 114 156 246 270 294 384 426 450 510 540	1224365283274
STPT(10)	2217622957205774147	0 2 12 14 42 44 72 74 84 86	1561479232858
SPT(16)	2217622969473195553	0 34 58 78 118 120 124 154 210 240 244 246 286 306 330 364	1573746654264
SPT(18)	2217623228101394237	0 62 90 120 132 146 150 152 192 290 330 332 336 350 362 392 420 482	1832374852948