Prime p₀= 974547028600235821 starts a Symmetric tuple of 18 consecutive primes (SPT).
d_n: 0 48 84 46 18 6 36 24 18 8 18 24 36 6 18 46 84 48 (?)
a_n: 0 48 132 178 196 202 238 262 280 288 306 330 366 372 390 436 520 568
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: 568
Found by: Theadalus
db: batch=76, k=18, 48 84 46 18 6 36 24 18 8

SPT(16)	974545688015192851	0 12 42 48 70 78 138 172 246 280 340 348 370 376 406 418	-1340585042970
SPT(16)	974545835270797943	0 6 26 30 44 60 74 84 116 126 140 156 170 174 194 200	-1193329437878
SPT(16)	974546196365984597	0 90 110 132 134 146 176 200 246 270 300 312 314 336 356 446	-832234251224
SPT(16)	974546201984819447	0 14 84 104 126 146 152 156 170 174 180 200 222 242 312 326	-826615416374
STPT(12)	974546419686502841	0 2 36 38 48 50 78 80 90 92 126 128	-608913732980
STPT(10)	974546662816071197	0 2 30 32 72 74 114 116 144 146	-365784164624
STPT(10)	974547230654694581	0 2 66 68 108 110 150 152 216 218	202054458760
SPT(16)	974547261731446561	0 28 48 90 112 138 162 252 286 376 400 426 448 490 510 538	233131210740
SPT(16)	974547653230373861	0 20 48 78 86 92 156 168 290 302 366 372 380 410 438 458	624630138040
STPT(10)	974547773581823027	0 2 30 32 72 74 114 116 144 146	744981587206
SPT(16)	974547884647417697	0 42 86 114 122 134 170 206 210 246 282 294 302 330 374 416	856047181876