Prime p₀= 999294010507450639 starts a Symmetric tuple of 18 consecutive primes (SPT).
d_n: 0 10 50 4 8 22 8 12 6 22 6 12 8 22 8 4 50 10 (?)
a_n: 0 10 60 64 72 94 102 114 120 142 148 160 168 190 198 202 252 262
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: 262
Found by: stoneageman
db: batch=76, k=18, 10 50 4 8 22 8 12 6 22

SPT(16)	999292751724455347	0 12 22 40 42 70 190 256 330 396 516 544 546 564 574 586	-1258782995292
STPT(10)	999292879292122241	0 2 30 32 78 80 126 128 156 158	-1131215328398
SPT(16)	999292989818037151	0 28 30 42 52 90 96 108 160 172 178 216 226 238 240 268	-1020689413488
SPT(16)	999293600642258039	0 42 68 72 128 132 150 170 210 230 248 252 308 312 338 380	-409865192600
SPT(16)	999293729316131387	0 26 56 66 120 140 176 180 272 276 312 332 386 396 426 452	-281191319252
STPT(10)	999293884410240047	0 2 30 32 72 74 114 116 144 146	-126097210592
STPT(10)	999294207987900701	0 2 30 32 60 62 90 92 120 122	197480450062
STPT(10)	999294475566578801	0 2 30 32 78 80 126 128 156 158	465059128162
SPT(16)	999294691273980539	0 50 92 110 140 158 162 198 242 278 282 300 330 348 390 440	680766529900
SPT(16)	999294975783900899	0 32 78 110 138 188 200 210 242 252 264 314 342 374 420 452	965276450260
TPT(14)	999295269604001339	0 2 60 62 90 92 102 104 132 134 228 230 312 314	1259096550700