Prime p₀= 1290438965451119459 starts a Symmetric tuple of 18 consecutive primes (SPT).
d_n: 0 122 6 12 10 2 46 26 28 8 28 26 46 2 10 12 6 122 (?)
a_n: 0 122 128 140 150 152 198 224 252 260 288 314 360 362 372 384 390 512
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: 512
Found by: Cruncher Pete
db: batch=77, k=18, 122 6 12 10 2 46 26 28 8

SPT(16)	1290438318193478627	0 42 62 96 110 122 132 186 350 404 414 426 440 474 494 536	-647257640832
SPT(16)	1290438408154181261	0 30 42 48 68 78 92 98 120 126 140 150 170 176 188 218	-557296938198
SPT(16)	1290438426339477917	0 54 126 132 134 144 222 266 270 314 392 402 404 410 482 536	-539111641542
TPT(14)	1290438647067953027	0 2 12 14 30 32 72 74 150 152 264 266 282 284	-318383166432
SPT(16)	1290438681325913071	0 10 12 18 36 42 58 66 142 150 166 172 190 196 198 208	-284125206388
SPT(16)	1290438788581542577	0 4 40 42 66 96 102 124 132 154 160 190 214 216 252 256	-176869576882
STPT(10)	1290439646522531801	0 2 6 8 18 20 30 32 36 38	681071412342
STPT(10)	1290439687298213117	0 2 12 14 42 44 72 74 84 86	721847093658
STPT(10)	1290439721616471467	0 2 30 32 42 44 54 56 84 86	756165352008
SPT(16)	1290439829929753627	0 4 22 90 106 124 166 172 204 210 252 270 286 354 372 376	864478634168
TPT(14)	1290440022963110291	0 2 18 20 150 152 186 188 198 200 240 242 306 308	1057511990832