Prime p₀= 1491395776292741269 starts a Symmetric tuple of 18 consecutive primes (SPT).
d_n: 0 4 126 42 12 26 18 16 36 2 36 16 18 26 12 42 126 4 (?)
a_n: 0 4 130 172 184 210 228 244 280 282 318 334 352 378 390 432 558 562
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: 562
Found by: BlackGoose05
db: batch=78, k=18, 4 126 42 12 26 18 16 36 2

STPT(10)	1491393264201541427	0 2 24 26 42 44 60 62 84 86	-2512091199842
STPT(10)	1491393365855070911	0 2 30 32 78 80 126 128 156 158	-2410437670358
SPT(16)	1491393608683859773	0 16 28 46 60 100 106 120 124 138 144 184 198 216 228 244	-2167608881496
STPT(10)	1491394267333448711	0 2 30 32 78 80 126 128 156 158	-1508959292558
STPT(10)	1491394841501352839	0 2 18 20 60 62 102 104 120 122	-934791388430
SPT(16)	1491395127522229711	0 6 12 28 48 60 66 88 90 112 118 130 150 166 172 178	-648770511558
STPT(10)	1491396180617783507	0 2 12 14 72 74 132 134 144 146	404325042238
STPT(10)	1491396554484532481	0 2 36 38 78 80 120 122 156 158	778191791212
STPT(10)	1491396589783830407	0 2 60 62 72 74 84 86 144 146	813491089138
SPT(16)	1491396656954317493	0 134 146 164 186 224 230 308 336 414 420 458 480 498 510 644	880661576224
SPT(16)	1491396924598112591	0 8 86 90 92 132 156 192 236 272 296 336 338 342 420 428	1148305371322