Prime p₀= 1266401972708820707 starts a Symmetric tuple of 18 consecutive primes (SPT).
d_n: 0 6 8 22 26 12 12 6 54 64 54 6 12 12 26 22 8 6 (?)
a_n: 0 6 14 36 62 74 86 92 146 210 264 270 282 294 320 342 350 356
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: 356
Found by: stoneageman
db: batch=77, k=18, 6 8 22 26 12 12 6 54 64

SPT(16)	1266401104599652601	0 20 48 72 108 116 128 156 242 270 282 290 326 350 378 398	-868109168106
SPT(16)	1266401190057109207	0 24 30 54 112 114 132 150 184 202 220 222 280 304 310 334	-782651711500
SPT(16)	1266401531090284999	0 12 42 100 102 120 124 144 310 330 334 352 354 412 442 454	-441618535708
STPT(10)	1266401688501220541	0 2 6 8 48 50 90 92 96 98	-284207600166
STPT(10)	1266401718317466947	0 2 60 62 72 74 84 86 144 146	-254391353760
SPT(16)	1266401749027965031	0 30 60 70 82 88 96 108 160 172 180 186 198 208 238 268	-223680855676
STPT(10)	1266402075383200529	0 2 48 50 90 92 132 134 180 182	102674379822
SPT(16)	1266402275192876933	0 18 44 86 138 140 158 210 254 306 324 326 378 420 446 464	302484056226
STPT(10)	1266402608414251421	0 2 36 38 78 80 120 122 156 158	635705430714
STPT(10)	1266402736726309487	0 2 30 32 42 44 54 56 84 86	764017488780
SPT(16)	1266402896604054481	0 16 30 70 100 156 166 198 208 240 250 306 336 376 390 406	923895233774