Prime p₀= 2639273419423083217 starts a Symmetric tuple of 18 consecutive primes (SPT).
d_n: 0 12 12 10 12 8 12 18 40 8 40 18 12 8 12 10 12 12 (?)
a_n: 0 12 24 34 46 54 66 84 124 132 172 190 202 210 222 232 244 256
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: 256
Found by: JayPi
db: batch=82, k=18, 12 12 10 12 8 12 18 40 8

SPT(16)	2639271950683386127	0 16 72 96 114 126 142 160 246 264 280 292 310 334 390 406	-1468739697090
STPT(10)	2639272031234287121	0 2 30 32 78 80 126 128 156 158	-1388188796096
TPT(14)	2639272734874605299	0 2 30 32 42 44 138 140 150 152 240 242 372 374	-684548477918
STPT(10)	2639273059942432097	0 2 30 32 60 62 90 92 120 122	-359480651120
SPT(16)	2639273256629766859	0 4 12 34 88 100 190 204 208 222 312 324 378 400 408 412	-162793316358
TPT(14)	2639273275654535369	0 2 12 14 78 80 90 92 132 134 150 152 168 170	-143768547848
SPT(16)	2639273522551738819	0 4 42 54 70 90 108 130 132 154 172 192 208 220 258 262	103128655602
STPT(10)	2639273635804111907	0 2 12 14 42 44 72 74 84 86	216381028690
STPT(10)	2639273705300932937	0 2 30 32 42 44 54 56 84 86	285877849720
STPT(10)	2639273908781701067	0 2 30 32 60 62 90 92 120 122	489358617850
STPT(10)	2639274279385718057	0 2 30 32 72 74 114 116 144 146	859962634840