Prime p₀= 2647744620753247679 starts a Symmetric tuple of 18 consecutive primes (SPT).
d_n: 0 20 4 44 84 48 22 6 30 26 30 6 22 48 84 44 4 20 (?)
a_n: 0 20 24 68 152 200 222 228 258 284 314 320 342 390 474 518 522 542
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: 542
Found by: RFGuy_KCCO
db: batch=82, k=18, 20 4 44 84 48 22 6 30 26

SPT(16)	2647743340660538201	0 8 30 50 92 152 168 170 180 182 198 258 300 320 342 350	-1280092709478
TPT(14)	2647743444972898967	0 2 90 92 114 116 132 134 144 146 210 212 312 314	-1175780348712
SPT(16)	2647744066172025923	0 6 86 90 98 114 128 138 146 156 170 186 194 198 278 284	-554581221756
SPT(16)	2647744371312068201	0 12 32 96 122 176 182 186 326 330 336 390 416 480 500 512	-249441179478
STPT(10)	2647744513614027557	0 2 30 32 72 74 114 116 144 146	-107139220122
STPT(10)	2647744517822028221	0 2 36 38 78 80 120 122 156 158	-102931219458
SPT(16)	2647744835847491057	0 2 42 146 170 182 230 240 296 306 354 366 390 494 534 536	215094243378
SPT(16)	2647745089688329843	0 6 18 108 114 130 136 150 154 168 174 190 196 286 298 304	468935082164
SPT(16)	2647745965871513743	0 10 18 36 70 108 148 168 196 216 256 294 328 346 354 364	1345118266064
SPT(16)	2647746436563613771	0 42 52 58 100 102 148 190 270 312 358 360 402 408 418 460	1815810366092
STPT(10)	2647746536111435651	0 2 6 8 48 50 90 92 96 98	1915358187972