Prime p₀= 2487194641902013553 starts a Symmetric tuple of 18 consecutive primes (SPT).
d_n: 0 80 58 48 68 24 28 2 12 34 12 2 28 24 68 48 58 80 (?)
a_n: 0 80 138 186 254 278 306 308 320 354 366 368 396 420 488 536 594 674
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: 674
Found by: Roadranner
db: batch=82, k=18, 80 58 48 68 24 28 2 12 34

SPT(13)	2487193567149724177	0 24 42 54 72 114 132 150 192 210 222 240 264	-1074752289376
STPT(12)	2487193817576644949	0 2 12 14 42 44 48 50 78 80 90 92	-824325368604
SPT(16)	2487193983197709041	0 2 42 72 86 92 110 152 156 198 216 222 236 266 306 308	-658704304512
STPT(10)	2487193985847497369	0 2 18 20 60 62 102 104 120 122	-656054516184
STPT(10)	2487194254413057359	0 2 18 20 30 32 42 44 60 62	-387488956194
SPT(16)	2487194565504436121	0 48 50 78 120 126 132 138 140 146 152 158 200 228 230 278	-76397577432
SPT(16)	2487195137847171601	0 12 16 22 28 48 58 66 82 90 100 120 126 132 136 148	495945158048
TPT(14)	2487195184524806759	0 2 48 50 78 80 108 110 210 212 222 224 318 320	542622793206
TPT(14)	2487195444439588409	0 2 18 20 60 62 72 74 90 92 132 134 168 170	802537574856
STPT(10)	2487195455272778597	0 2 12 14 42 44 72 74 84 86	813370765044
STPT(10)	2487195531026106737	0 2 12 14 72 74 132 134 144 146	889124093184