Prime p₀= 2249320335527976281 starts a Symmetric tuple of 18 consecutive primes (SPT).
d_n: 0 20 10 56 4 6 20 16 24 56 24 16 20 6 4 56 10 20 (?)
a_n: 0 20 30 86 90 96 116 132 156 212 236 252 272 278 282 338 348 368
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: 368
Found by: JayPi
db: batch=81, k=18, 20 10 56 4 6 20 16 24 56

STPT(10)	2249317677916623707	0 2 30 32 42 44 54 56 84 86	-2657611352574
SPT(16)	2249317766097651013	0 34 48 64 70 108 114 118 186 190 196 234 240 256 270 304	-2569430325268
SPT(16)	2249318146379828663	0 54 60 98 104 128 194 228 236 270 336 360 366 404 410 464	-2189148147618
STPT(10)	2249318564442214547	0 2 42 44 72 74 102 104 144 146	-1771085761734
STPT(10)	2249319366065516411	0 2 6 8 18 20 30 32 36 38	-969462459870
STPT(10)	2249319735436983257	0 2 42 44 72 74 102 104 144 146	-600090993024
SPT(16)	2249320390992104537	0 6 24 56 60 90 92 104 162 174 176 206 210 242 260 266	55464128256
SPT(16)	2249320421010903677	0 50 54 66 110 114 126 176 210 260 272 276 320 332 336 386	85482927396
SPT(16)	2249320917289879247	0 2 12 50 66 80 92 96 110 114 126 140 156 194 204 206	581761902966
STPT(10)	2249321820079899317	0 2 30 32 42 44 54 56 84 86	1484551923036
STPT(10)	2249321838316845137	0 2 24 26 42 44 60 62 84 86	1502788868856