Prime p₀= 2222295486146099227 starts a Symmetric tuple of 18 consecutive primes (SPT).
d_n: 0 12 30 48 10 32 4 18 2 4 2 18 4 32 10 48 30 12 (?)
a_n: 0 12 42 90 100 132 136 154 156 160 162 180 184 216 226 274 304 316
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: 316
Found by: Penguin
db: batch=81, k=18, 12 30 48 10 32 4 18 2 4

SPT(16)	2222294300846057927	0 12 20 54 102 152 212 240 254 282 342 392 440 474 482 494	-1185300041300
STPT(10)	2222294459568275579	0 2 12 14 90 92 168 170 180 182	-1026577823648
SPT(16)	2222294462307238937	0 66 72 74 92 102 156 206 330 380 434 444 462 464 470 536	-1023838860290
STPT(10)	2222294616248423147	0 2 54 56 72 74 90 92 144 146	-869897676080
TPT(14)	2222294812290278771	0 2 66 68 78 80 138 140 168 170 288 290 348 350	-673855820456
STPT(10)	2222295160442148677	0 2 30 32 42 44 54 56 84 86	-325703950550
SPT(16)	2222296041126074363	0 20 36 38 84 108 116 146 228 258 266 290 336 338 354 374	554979975136
STPT(10)	2222296048034414237	0 2 54 56 72 74 90 92 144 146	561888315010
SPT(16)	2222296230585570301	0 66 78 82 136 142 148 196 222 270 276 282 336 340 352 418	744439471074
STPT(10)	2222296624823897549	0 2 12 14 90 92 168 170 180 182	1138677798322
STPT(10)	2222296922391409151	0 2 36 38 78 80 120 122 156 158	1436245309924