Prime p₀= 2577555634394078563 starts a Symmetric tuple of 18 consecutive primes (SPT).
d_n: 0 30 28 38 28 12 54 30 18 38 18 30 54 12 28 38 28 30 (?)
a_n: 0 30 58 96 124 136 190 220 238 276 294 324 378 390 418 456 484 514
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: 514
Found by: JayPi
db: batch=82, k=18, 30 28 38 28 12 54 30 18 38

SPT(16)	2577554446717827337	0 46 76 90 124 192 220 232 234 246 274 342 376 390 420 466	-1187676251226
SPT(16)	2577554695936412411	0 50 72 116 156 248 266 282 296 312 330 422 462 506 528 578	-938457666152
SPT(16)	2577554990827894171	0 28 30 42 112 138 142 156 202 216 220 246 316 328 330 358	-643566184392
SPT(16)	2577555270351594031	0 10 28 58 66 118 142 148 240 246 270 322 330 360 378 388	-364042484532
STPT(10)	2577555528379592741	0 2 36 38 78 80 120 122 156 158	-106014485822
SPT(16)	2577555566725475527	0 6 52 70 94 126 132 156 190 214 220 252 276 294 340 346	-67668603036
STPT(10)	2577555847605852929	0 2 12 14 90 92 168 170 180 182	213211774366
SPT(16)	2577555970491948769	0 10 12 30 64 138 142 222 250 330 334 408 442 460 462 472	336097870206
SPT(16)	2577556313454130291	0 28 96 126 148 178 192 208 360 376 390 420 442 472 540 568	679060051728
SPT(16)	2577556392166896761	0 36 38 60 96 152 158 168 200 210 216 272 308 330 332 368	757772818198
SPT(16)	2577557395468073401	0 10 18 28 40 48 126 130 258 262 340 348 360 370 378 388	1761073994838