Prime p₀= 2056538111417031961 starts a Symmetric tuple of 18 consecutive primes (SPT).
d_n: 0 28 8 16 56 4 6 12 8 22 8 12 6 4 56 16 8 28 (?)
a_n: 0 28 36 52 108 112 118 130 138 160 168 180 186 190 246 262 270 298
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: 298
Found by: gemini8
db: batch=80, k=18, 28 8 16 56 4 6 12 8 22

SPT(16)	2056537415813326951	0 10 52 66 112 126 186 190 192 196 256 270 316 330 372 382	-695603705010
STPT(10)	2056537528602140957	0 2 90 92 102 104 114 116 204 206	-582814891004
STPT(10)	2056537773587851199	0 2 48 50 60 62 72 74 120 122	-337829180762
STPT(14)	2056537831860574757	0 2 60 62 90 92 102 104 114 116 144 146 204 206	-279556457204
TPT(14)	2056537831860574757	0 2 60 62 90 92 102 104 114 116 144 146 204 206	-279556457204
SPT(16)	2056537927300381649	0 14 18 24 38 98 102 150 152 200 204 264 278 284 288 302	-184116650312
STPT(10)	2056538650683439301	0 2 36 38 78 80 120 122 156 158	539266407340
SPT(16)	2056539096114328877	0 2 32 56 62 80 116 132 140 156 192 210 216 240 270 272	984697296916
STPT(10)	2056539195041070317	0 2 30 32 42 44 54 56 84 86	1083624038356
STPT(10)	2056539317505319181	0 2 78 80 108 110 138 140 216 218	1206088287220
SPT(16)	2056539505304028257	0 14 24 30 86 90 132 140 156 164 206 210 266 272 282 296	1393886996296