List of champions for factoring Cunningham numbers:

Special number field sieve:
3929	C142	10,167-	NFSNET
3980	C167	3,349-	NFSNET

Largest penultimate prime factor (ultimate factor shown also):
3980	p80*p87	 3,349-	   NFSNET
3409	p69*p90  2,523-    A. K. Lenstra & D. Bernstein with two MasPars

	First five holes in each table on February 6, 1997:

2,569-	c128	2,571-	c164	2,581-	c125	2,589-	c148	2,593-	c153
2,569+	c144	2,587+	c151	2,589+	c150	2,611+	c123	2,613+	c185
2,998L	c123	2,1006L	c134	2,1042M	c141	2,1058L	c153	2,1066M	c145
2,556+	c134	2,568+	c120	2,592+	c174	2,608+	c149	2,628+	c141

3,371-	c118	3,373-	c178	3,379-	c155	3,389-	c168	3,397-	c178
3,344+	c144	3,347+	c162	3,349+	c144	3,353+	c146	3,356+	c153

5,233-	c148	5,247-	c147	5,283-	c116	5,299-	c171	5,565M	c147
5,239+	c147	5,242+	c150	5,248+	c156	5,251+	c165	5,254+	c121

6,221-	c139	6,227-	c150	6,233-	c166	6,241-	c122	6,251-	c157
6,209+	c130	6,218+	c130	6,224+	c137	6,226+	c148	6,227+	c127

7,199-	c132	7,211-	c173	7,227-	c192	7,233-	c155	7,235-	c156
7,191+	c152	7,193+	c139	7,208+	c155	7,211+	c170	7,214+	c150

10,169-	c152	10,173-	c154	10,187-	c152	10,197-	c169	10,209-	c159
10,166+	c164	10,167+	c118	10,169+	c145	10,172+	c168	10,179+	c178

11,167-	c128	11,169-	c151	11,181-	c177	11,187-	c143	11,191-	c193
11,149+	c145	11,166+	c129	11,167+	c164	11,172+	c130	11,175+	c120

12,149-	c156	12,161-	c135	12,163-	c120	12,173-	c152	12,179-	c190
12,148+	c156	12,151+	c128	12,163+	c132	12,167+	c180	12,169+	c132

Here is the list of smaller but needed numbers:

2,725-	c99
2,917-	c105
2,655-	c109
2,685+	c109