Prime p₀= 990606975287841559 starts a Symmetric tuple of 18 consecutive primes (SPT).
d_n: 0 18 12 28 26 4 42 18 42 32 42 18 42 4 26 28 12 18 (?)
a_n: 0 18 30 58 84 88 130 148 190 222 264 282 324 328 354 382 394 412
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: 412
Found by: HenkM
db: batch=76, k=18, 18 12 28 26 4 42 18 42 32

STPT(10)	990605753116557647	0 2 24 26 42 44 60 62 84 86	-1222171283912
STPT(10)	990606002093868071	0 2 6 8 18 20 30 32 36 38	-973193973488
STPT(10)	990606210661207109	0 2 12 14 30 32 48 50 60 62	-764626634450
SPT(16)	990606212268523073	0 18 20 48 138 186 194 230 234 270 278 326 416 444 446 464	-763019318486
STPT(10)	990606330272503337	0 2 30 32 42 44 54 56 84 86	-645015338222
SPT(16)	990606971815195373	0 8 30 44 150 176 198 234 350 386 408 434 540 554 576 584	-3472646186
STPT(10)	990607273188266021	0 2 36 38 78 80 120 122 156 158	297900424462
SPT(16)	990607589720155543	0 28 64 76 78 90 100 168 196 264 274 286 288 300 336 364	614432313984
SPT(16)	990607668162991013	0 48 78 114 126 146 168 170 174 176 198 218 230 266 296 344	692875149454
SPT(16)	990607924372521187	0 12 40 46 64 84 96 144 172 220 232 252 270 276 304 316	949084679628
STPT(10)	990608255226651701	0 2 6 8 48 50 90 92 96 98	1279938810142