Support ECM 7.0.6

Author: antonio-rojas

src/sage/interfaces/ecm.py

@@ -508,7 +508,6 @@ def _find_factor(self, n, factor_digits, B1, **kwds):
         """
         n = self._validate(n)
         kwds.setdefault('c', 1000000000)
-        kwds.setdefault('I', 1)
         if factor_digits is not None:
             B1 = self.recommended_B1(factor_digits)
         kwds['one'] = True

src/sage/libs/libecm.pyx

@@ -149,11 +149,13 @@ def ecmfactor(number, double B1, verbose=False, sigma=0):
     Some special cases::
 
         sage: ecmfactor(1, 100)
-        (True, 1, ...)
+        Traceback (most recent call last):
+        ...
+        ValueError: Input number (1) must be greater than 1
         sage: ecmfactor(0, 100)
         Traceback (most recent call last):
         ...
-        ValueError: Input number (0) must be positive
+        ValueError: Input number (0) must be greater than 1
     """
     cdef mpz_t n, f
     cdef int res
@@ -164,8 +166,8 @@ def ecmfactor(number, double B1, verbose=False, sigma=0):
     sage_int_number = Integer(number)
     sage_int_sigma = Integer(sigma)
 
-    if number <= 0:
-        raise ValueError("Input number (%s) must be positive"%number)
+    if number <= 1:
+        raise ValueError("Input number (%s) must be greater than 1"%number)
 
     if verbose:
         print("Performing one curve with B1=%1.0f" % B1)