Prime p₀= 2252251879732819451 starts a Symmetric tuple of 18 consecutive primes (SPT).
d_n: 0 6 80 30 16 36 14 28 2 4 2 28 14 36 16 30 80 6 (?)
a_n: 0 6 86 116 132 168 182 210 212 216 218 246 260 296 312 342 422 428
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: 428
Found by: JayPi
db: batch=81, k=18, 6 80 30 16 36 14 28 2 4

SPT(16)	2252250092685666211	0 28 52 66 90 106 120 138 190 208 222 238 262 276 300 328	-1787047153240
STPT(10)	2252250184765615787	0 2 30 32 42 44 54 56 84 86	-1694967203664
SPT(18)	2252250431330421653	0 36 80 84 110 126 186 228 234 260 266 308 368 384 410 414 458 494	-1448402397798
STPT(12)	2252250482519835797	0 2 30 32 42 44 72 74 84 86 114 116	-1397212983654
STPT(10)	2252250660820450049	0 2 42 44 90 92 138 140 180 182	-1218912369402
SPT(16)	2252251684407155749	0 28 94 108 132 142 148 154 288 294 300 310 334 348 414 442	-195325663702
SPT(16)	2252251904353087591	0 6 10 78 120 126 216 262 276 322 412 418 460 528 532 538	24620268140
STPT(10)	2252252020459200167	0 2 42 44 72 74 102 104 144 146	140726380716
SPT(16)	2252252035351356083	0 8 36 44 68 96 156 170 174 188 248 276 300 308 336 344	155618536632
SPT(16)	2252252385893542859	0 38 72 74 78 80 84 92 150 158 162 164 168 170 204 242	506160723408
SPT(16)	2252253009331526011	0 42 46 52 130 136 142 150 178 186 192 198 276 282 286 328	1129598706560