Prime p₀= 1989630492184376021 starts a Symmetric tuple of 18 consecutive primes (SPT).
d_n: 0 26 10 24 6 44 70 6 6 44 6 6 70 44 6 24 10 26 (?)
a_n: 0 26 36 60 66 110 180 186 192 236 242 248 318 362 368 392 402 428
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: ChUcK
db: batch=80, k=18, 26 10 24 6 44 70 6 6 44

SPT(16)	1989629340978494911	0 12 16 22 36 42 76 112 120 156 190 196 210 216 220 232	-1151205881110
STPT(10)	1989629444879291399	0 2 18 20 30 32 42 44 60 62	-1047305084622
STPT(10)	1989629627031789437	0 2 30 32 60 62 90 92 120 122	-865152586584
SPT(16)	1989630176767581727	0 12 40 54 60 64 82 96 220 234 252 256 262 276 304 316	-315416794294
SPT(16)	1989630195478904543	0 24 66 120 134 200 204 210 284 290 294 360 374 428 470 494	-296705471478
STPT(10)	1989630209826515357	0 2 24 26 192 194 360 362 384 386	-282357860664
SPT(16)	1989631259973816469	0 28 54 90 150 168 192 204 208 220 244 262 322 358 384 412	767789440448
SPT(16)	1989631538137944919	0 10 18 52 54 58 102 138 154 190 234 238 240 274 282 292	1045953568898
SPT(16)	1989631708623403763	0 50 86 144 168 218 228 240 314 326 336 386 410 468 504 554	1216439027742
STPT(10)	1989631912936024517	0 2 30 32 42 44 54 56 84 86	1420751648496
SPT(16)	1989633020669009959	0 84 94 102 118 162 210 220 312 322 370 414 430 438 448 532	2528484633938