Prime p₀= 976217784157244749 starts a Symmetric tuple of 18 consecutive primes (SPT).
d_n: 0 4 20 118 110 12 18 48 10 74 10 48 18 12 110 118 20 4 (?)
a_n: 0 4 24 142 252 264 282 330 340 414 424 472 490 502 612 730 750 754
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: 754
Found by: HenkM
db: batch=76, k=18, 4 20 118 110 12 18 48 10 74

SPT(16)	976216589038399073	0 26 54 56 66 134 170 234 266 330 366 434 444 446 474 500	-1195118845676
TPT(16)	976216703336265317	0 2 54 56 132 134 180 182 192 194 210 212 222 224 252 254	-1080820979432
SPT(16)	976217014486652333	0 24 36 96 108 150 156 176 198 218 224 266 278 338 350 374	-769670592416
SPT(16)	976217365139423989	0 4 22 30 58 112 124 138 154 168 180 234 262 270 288 292	-419017820760
STPT(10)	976217367080215607	0 2 12 14 42 44 72 74 84 86	-417077029142
SPT(16)	976217536709229743	0 8 38 60 66 144 164 236 258 330 350 428 434 456 486 494	-247448015006
STPT(10)	976218133393928609	0 2 30 32 60 62 90 92 120 122	349236683860
SPT(16)	976218169719754919	0 44 60 62 74 84 102 122 132 152 170 180 192 194 210 254	385562510170
SPT(16)	976218195825745933	0 46 48 54 58 64 118 120 124 126 180 186 190 196 198 244	411668501184
SPT(16)	976218337217890867	0 24 36 66 90 130 150 162 184 196 216 256 280 310 322 346	553060646118
STPT(10)	976218527547262157	0 2 54 56 72 74 90 92 144 146	743390017408